Segmented superplastic deformation method of titanium alloy and related equipment
By using a segmented superplastic deformation method to dynamically monitor and adjust the strain rate, the problem of titanium alloys being difficult to plastically deform at room temperature was solved, achieving efficient superplastic deformation of titanium alloys and full utilization of their ultimate superplastic potential.
Patent Information
- Application Number
- CN202510920402.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-04
- Publication Date
- 2025-11-25
AI Technical Summary
Titanium alloys are difficult to plastically deform at room temperature, and traditional superplastic processing methods are inefficient and difficult to achieve the material's ultimate superplasticity.
A segmented superplastic deformation method was adopted, in which titanium alloy samples were randomly divided into two groups and treated under different superplastic deformation conditions, including superplastic deformation by the maximum m-value method and superplastic deformation by constant strain rate. The strain rate was dynamically monitored and adjusted to achieve segmented superplastic tensile deformation.
It improves the superplastic deformation efficiency of titanium alloys, reduces costs, fully taps the ultimate superplastic potential of titanium alloys, and enhances deformation effects.
Smart Images
Figure CN121011291A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of superplastic deformation processing technology for metallic materials, and in particular to a segmented superplastic deformation method and related equipment for titanium alloys. Background Technology
[0002] Titanium alloys are widely used in aerospace, automotive, and chemical industries due to their high strength, low density, good corrosion resistance, and high-temperature performance. However, titanium alloys have poor machinability, especially in terms of plastic deformation processing at room temperature. In related technologies, superplasticity refers to the property of a material exhibiting high ductility and low deformation resistance under specific conditions. Superplasticity can be utilized to achieve efficient and low-cost manufacturing of complex-shaped parts. Traditional superplastic processing methods mainly employ constant strain rate stretching, but this method suffers from problems such as requiring numerous experiments, low efficiency, and difficulty in obtaining the material's ultimate superplasticity.
[0003] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the Invention
[0004] The main objective of this application is to propose a method and related equipment for segmented superplastic deformation of titanium alloys.
[0005] To achieve the above objectives, one aspect of this application proposes a method for segmented superplastic deformation of titanium alloys, the method comprising the following steps:
[0006] Select a number of titanium alloy samples with the same material properties parameters, and divide the titanium alloy samples into a first group and a second group by random grouping. The material properties parameters include the chemical composition, geometric dimensions and initial microstructure of the material.
[0007] The first group of samples was subjected to a first superplastic deformation condition, which included thermodynamic process parameters, a first segmented superplastic deformation strategy, and a segmented superplastic deformation termination condition. The thermodynamic process parameters included a preset deformation temperature and a holding time. The first segmented superplastic deformation strategy included superplastic deformation using the maximum m-value method and superplastic deformation using a constant equivalent strain rate.
[0008] The second group of samples was subjected to a second superplastic deformation condition, which included the thermodynamic process parameters, the second segmented superplastic deformation strategy, and the segmented superplastic deformation termination condition. The second segmented superplastic deformation strategy included the maximum m-value method for superplastic deformation and instantaneous strain rate constant superplastic deformation.
[0009] In some embodiments, the treatment of the first group of samples under a first superplastic deformation condition includes:
[0010] Each of the first titanium alloy samples in the first group of samples is placed in a superplastic deformation environment corresponding to the thermodynamic process parameters.
[0011] In the superplastic deformation environment, according to the superplastic deformation method of the maximum m value, each of the first titanium alloy samples is subjected to a first stage of superplastic tensile deformation, and the first superplastic deformation tensile force corresponding to each of the first titanium alloy samples during the first stage of superplastic tensile deformation is dynamically monitored.
[0012] When the first superplastic deformation tensile force is detected to be less than the preset first tensile force threshold, the first stage of superplastic tensile deformation is stopped, and the amount of superplastic tensile deformation and the tensile time corresponding to the first titanium alloy sample are determined.
[0013] Based on the superplastic tensile deformation and tensile time corresponding to each of the first titanium alloy specimens, the equivalent strain rate corresponding to each of the first titanium alloy specimens is determined, and the equivalent strain rate is determined as the first constant strain rate.
[0014] Based on the first constant strain rate corresponding to each of the first titanium alloy specimens, a second-stage superplastic tensile deformation is performed on each of the first titanium alloy specimens.
[0015] The second superplastic deformation tensile force corresponding to each of the first titanium alloy samples during the second stage of superplastic tensile deformation is dynamically monitored. When the second superplastic deformation tensile force is detected to be less than the preset second tensile force threshold, the second stage of superplastic tensile deformation is stopped.
[0016] In some embodiments, the step of treating the second group of samples under a second superplastic deformation condition includes:
[0017] Each of the second titanium alloy samples in the second group of samples was placed in a superplastic deformation environment corresponding to the thermodynamic process parameters.
[0018] In the superplastic deformation environment, each of the second titanium alloy specimens is subjected to first-stage superplastic tensile deformation according to the maximum m-value method superplastic deformation.
[0019] The first superplastic deformation tensile force corresponding to each of the second titanium alloy specimens during the first stage of superplastic tensile deformation is dynamically monitored. When the first superplastic deformation tensile force is detected to be less than the preset first tensile force threshold, the first stage of superplastic tensile deformation is stopped, and the instantaneous strain rate of the second titanium alloy specimen at the stop time of the first stage of superplastic tensile deformation is monitored.
[0020] The instantaneous strain rate corresponding to each of the second titanium alloy samples is determined as the second constant strain rate;
[0021] Based on the second constant strain rate corresponding to each of the titanium alloy specimens, the second stage of superplastic tensile deformation is performed on each of the second titanium alloy specimens, and the second superplastic deformation tensile force corresponding to each of the second titanium alloy specimens is dynamically monitored during the second stage of superplastic tensile deformation.
[0022] When the second superplastic deformation tensile force is detected to be less than the preset second tensile force threshold, the second stage of superplastic tensile deformation is stopped.
[0023] In some embodiments, the first-stage superplastic tensile deformation of each of the second titanium alloy specimens in the superplastic deformation environment, according to the maximum m-value method of superplastic deformation, includes:
[0024] Obtain the strain rate sensitivity index m-value curve corresponding to the preset deformation temperature, identify the peak point in the m-value curve, and determine the strain rate corresponding to the peak point as the optimal strain rate.
[0025] In the superplastic deformation environment, according to the maximum m-value method of superplastic deformation, with the optimal strain rate as the control benchmark, each of the second titanium alloy specimens undergoes a first stage of superplastic tensile deformation. During the first stage of superplastic tensile deformation, the strain rate is dynamically adjusted to keep the current m-value within the peak fluctuation range. The peak fluctuation range is determined by the peak point and the preset fluctuation value.
[0026] In some embodiments, the method further includes:
[0027] The first deformation effect index and the second deformation effect index are dynamically monitored. The first deformation effect index includes the deformation effect index of each first titanium alloy sample in the first group of samples during the superplastic tensile deformation process. The second deformation effect index includes the deformation effect index of each second titanium alloy sample in the second group of samples during the superplastic tensile deformation process. The deformation effect index includes elongation, flow stress and deformation uniformity.
[0028] Data analysis is performed on the first deformation effect index to determine the first superplastic deformation analysis result corresponding to the first superplastic deformation condition.
[0029] Data analysis is performed on the second deformation effect index to determine the second superplastic deformation analysis result corresponding to the second superplastic deformation condition.
[0030] In some embodiments, the step of subjecting each first titanium alloy specimen to a second-stage superplastic tensile deformation according to the first constant strain rate corresponding to each first titanium alloy specimen includes:
[0031] In the superplastic deformation environment, each of the first titanium alloy specimens is subjected to constant strain rate superplastic tensile deformation with the first constant strain rate as the control reference.
[0032] During the constant strain rate superplastic tensile deformation process, the current strain rate is dynamically adjusted so that the difference between the current strain rate and the first constant strain rate is within a preset range.
[0033] In some embodiments, the equivalent strain rate is expressed by the following formula:
[0034]
[0035] Where, ε eq ε is the equivalent strain rate, ε is the superplastic tensile deformation, and t is the tensile time.
[0036] To achieve the above objectives, another aspect of this application provides a segmented superplastic deformation device for titanium alloys, characterized in that the device comprises:
[0037] The first module is used to select a number of titanium alloy samples with the same material properties parameters, and to divide the titanium alloy samples into a first group and a second group by random grouping. The material properties parameters include the chemical composition, geometric dimensions and initial microstructure of the material.
[0038] The second module is used to process the first group of samples under a first superplastic deformation condition. The first superplastic deformation condition includes thermodynamic process parameters, a first segmented superplastic deformation strategy, and a segmented superplastic deformation termination condition. The thermodynamic process parameters include a preset deformation temperature and a holding time. The first segmented superplastic deformation strategy includes superplastic deformation using the maximum m-value method and superplastic deformation using a constant equivalent strain rate.
[0039] The third module is used to process the second group of samples under the second superplastic deformation conditions. The second superplastic deformation conditions include the thermodynamic process parameters, the second segmented superplastic deformation strategy, and the segmented superplastic deformation termination conditions. The second segmented superplastic deformation strategy includes the maximum m-value method superplastic deformation and instantaneous strain rate constant superplastic deformation.
[0040] To achieve the above objectives, another aspect of this application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the method described above.
[0041] To achieve the above objectives, another aspect of the embodiments of this application proposes a computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods described above.
[0042] The embodiments of this application include at least the following beneficial effects: This application provides a method, apparatus, electronic device, and storage medium for segmented superplastic deformation of titanium alloys. This method selects a predetermined number of titanium alloy samples with the same material properties, randomly groups them into a first group and a second group, processes the first group of samples under a first superplastic deformation condition, and processes the second group of samples under a second superplastic deformation condition. This application enables automated superplastic deformation of titanium alloys, improves superplastic deformation efficiency, reduces costs, enhances the superplastic deformation effect of titanium alloys, and fully explores the ultimate superplastic potential of titanium alloys. Attached Figure Description
[0043] Figure 1 This is a flowchart of a segmented superplastic deformation method for titanium alloys provided in an embodiment of this application;
[0044] Figure 2 This is a schematic diagram of the superplastic deformation of the titanium alloy sample in the embodiments of this application;
[0045] Figure 3 This is a schematic diagram of the structure of a segmented superplastic deformation device for titanium alloy provided in an embodiment of this application;
[0046] Figure 4 This is a schematic diagram of the hardware structure of an electronic device provided in an embodiment of this application. Detailed Implementation
[0047] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.
[0048] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various concepts, but unless otherwise stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words “if,” “when,” or “in response to a determination” as used herein may be interpreted as “when…” or “when…” or “in response to a determination.”
[0049] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.
[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.
[0051] The segmented superplastic deformation method for titanium alloys provided in this application relates to the field of information technology. This method can be applied to terminals, servers, or software running on either terminal or server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, smart speaker, smartwatch, or vehicle terminal, but is not limited to these. The server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The server can also be a node server in a blockchain network. The software can be an application implementing the segmented superplastic deformation method for titanium alloys, but is not limited to the above forms.
[0052] This application can be used in a wide variety of general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.
[0053] It should be noted that in all specific embodiments of this application, when processing data related to user identity or characteristics, such as user information, user behavior data, user historical data, and user location information, user permission or consent is obtained first. Furthermore, the collection, use, and processing of this data comply with relevant laws, regulations, and standards. In addition, when embodiments of this application require access to sensitive personal information of users, separate permission or consent from the user is obtained through pop-ups or redirection to confirmation pages. Only after obtaining the user's separate permission or consent is the necessary user-related data required for the proper functioning of these embodiments acquired.
[0054] Figure 1 This is an optional flowchart of the segmented superplastic deformation method for titanium alloys provided in the embodiments of this application. Figure 1 The method may include, but is not limited to, steps S101 to S103.
[0055] Step S101: Select a number of titanium alloy samples with the same material properties parameters according to a preset number, and divide the multiple titanium alloy samples into a first group of samples and a second group of samples by random grouping. The material properties parameters include the chemical composition, geometric dimensions and initial microstructure of the material.
[0056] Step S102: The first group of samples is placed under the first superplastic deformation conditions for treatment. The first superplastic deformation conditions include thermodynamic process parameters, a first segmented superplastic deformation strategy, and a segmented superplastic deformation termination condition. The first segmented superplastic deformation strategy includes superplastic deformation using the maximum m-value method and superplastic deformation using a constant equivalent strain rate.
[0057] Step S103: The second group of samples is placed under the second superplastic deformation conditions for treatment. The second superplastic deformation conditions include thermodynamic process parameters, a second segmented superplastic deformation strategy, and a segmented superplastic deformation termination condition. The second segmented superplastic deformation strategy includes superplastic deformation using the maximum m-value method and superplastic deformation using a constant instantaneous strain rate.
[0058] In some embodiments, for example, SP700 titanium alloy sheet is selected as a titanium alloy sample, and the SP700 titanium alloy sheet is cut and processed to obtain N titanium alloy samples with the same geometric dimensions. By random grouping, the N titanium alloy samples with the same geometric dimensions are divided into a first group and a second group. The first group and the second group each contain N / 2 (if N is an even number) titanium alloy samples or N / 2-1 (if N is an odd number) titanium alloy samples. The multiple titanium alloy samples contained in the first group are all marked as the first titanium alloy sample. Similarly, the multiple titanium alloy samples contained in the second group are all marked as the second titanium alloy sample.
[0059] In some embodiments, in the first and second superplastic deformation conditions, the thermodynamic process parameters and the segmented superplastic deformation termination conditions, as well as the maximum m-value method superplastic deformation included in each condition, are consistent. The maximum m-value method superplastic deformation indicates that the titanium alloy sample is subjected to first-stage superplastic tensile deformation using the maximum m-value method. The segmented superplastic deformation termination conditions include the termination conditions for the first-stage superplastic tensile deformation and the termination conditions for the second-stage superplastic tensile deformation. The thermodynamic process parameters include a preset deformation temperature and a holding time. The preset deformation temperature is selected from a deformation temperature range. Optionally, the deformation temperature range is generally from 740°C to 800°C and can be adjusted according to the actual application.
[0060] The difference between the first and second superplastic deformation conditions lies in the constant equivalent strain rate superplastic deformation in the first segmented superplastic deformation strategy and the constant instantaneous strain rate superplastic deformation in the second segmented superplastic deformation strategy. Specifically, constant equivalent strain rate superplastic deformation means selecting the equivalent strain rate obtained after superplastic deformation using the maximum m-value method as the constant strain rate, and performing a second-stage superplastic tensile deformation on the titanium alloy specimen using this constant strain rate. Constant instantaneous strain rate superplastic deformation means selecting the instantaneous strain rate monitored at the moment the superplastic deformation using the maximum m-value method stops as the constant strain rate, and performing a second-stage superplastic tensile deformation on the titanium alloy specimen using this constant strain rate.
[0061] In some embodiments, step S102 may include, but is not limited to, steps S201 to S203:
[0062] Step S201: Place each of the first titanium alloy samples in the first group of samples in a superplastic deformation environment corresponding to the thermodynamic process parameters.
[0063] Step S202: In the superplastic deformation environment, according to the maximum m-value method of superplastic deformation, the first stage of superplastic tensile deformation is carried out on each first titanium alloy sample, and the first superplastic deformation tensile force corresponding to each first titanium alloy sample during the first stage of superplastic tensile deformation is dynamically monitored.
[0064] Step S203: When the first superplastic deformation tensile force is detected to be less than the preset first tensile force threshold, the first stage of superplastic tensile deformation is stopped, and the superplastic tensile deformation amount and tensile time corresponding to the first titanium alloy sample are determined.
[0065] Step S204: Based on the superplastic tensile deformation and tensile time corresponding to each first titanium alloy sample, determine the equivalent strain rate corresponding to each first titanium alloy sample, and determine the equivalent strain rate as the first constant strain rate.
[0066] Step S205: According to the first constant strain rate corresponding to each first titanium alloy sample, perform second-stage superplastic tensile deformation on each first titanium alloy sample.
[0067] Step S206: Dynamically monitor the second superplastic deformation tensile force corresponding to each first titanium alloy sample during the second stage of superplastic tensile deformation. When the monitored second superplastic deformation tensile force is less than the preset second tensile force threshold, stop the second stage of superplastic tensile deformation.
[0068] In some embodiments, the equivalent strain rate described above is expressed by the following formula:
[0069]
[0070] Where, ε eq ε is the equivalent strain rate, ε is the superplastic tensile deformation, and t is the tensile time.
[0071] For each first titanium alloy specimen, the equivalent strain rate of the first titanium alloy specimen is used as the constant strain rate. Based on this constant strain rate, the first titanium alloy specimen is subjected to a second stage of superplastic tensile deformation. When the second superplastic deformation tensile force is detected to be less than the preset second tensile force threshold, it indicates that the first titanium alloy specimen is in a broken state, and the second stage of superplastic tensile deformation is stopped.
[0072] In some embodiments, step S103 may include, but is not limited to, steps S301 to S306.
[0073] Step S301: Place each of the second titanium alloy samples in the second group of samples in a superplastic deformation environment corresponding to the thermodynamic process parameters.
[0074] Step S302: In the superplastic deformation environment, the first stage of superplastic tensile deformation is performed on each second titanium alloy sample according to the maximum m-value method.
[0075] Step S303: Dynamically monitor the first superplastic deformation tensile force corresponding to each second titanium alloy sample during the first stage of superplastic tensile deformation. When the first superplastic deformation tensile force is detected to be less than the preset first tensile force threshold, stop the first stage of superplastic tensile deformation and monitor the instantaneous strain rate of the second titanium alloy sample at the stop time of the first stage of superplastic tensile deformation.
[0076] Step S304: Determine the instantaneous strain rate corresponding to each second titanium alloy sample as the second constant strain rate.
[0077] Step S305: According to the second constant strain rate corresponding to each titanium alloy sample, perform second-stage superplastic tensile deformation on each second titanium alloy sample, and dynamically monitor the second superplastic deformation tensile force corresponding to each second titanium alloy sample during the second-stage superplastic tensile deformation process.
[0078] Step S306: When the second superplastic deformation tensile force is detected to be less than the preset second tensile force threshold, the second stage of superplastic tensile deformation is stopped.
[0079] In some embodiments, for each second titanium alloy specimen, the instantaneous strain rate monitored at the moment the first stage of superplastic tensile deformation stops is used as the constant strain rate. Based on the constant strain rate, the second stage of superplastic tensile deformation is performed on the second titanium alloy specimen. When the second superplastic deformation tensile force is detected to be less than the preset second tensile force threshold, it indicates that the second titanium alloy specimen is in a broken state, and the second stage of superplastic tensile deformation is stopped.
[0080] Optionally, the first and second superplastic deformation tensile forces are dynamically monitored using a tensile sensor. During the first stage of superplastic tensile deformation, when the first superplastic deformation tensile force is detected to be less than a preset first tensile force threshold (e.g., 20 kN), the first stage of superplastic tensile deformation is stopped. Assuming the stopping time of the first stage of superplastic tensile deformation is t1, the instantaneous strain rate ε corresponding to t1 is monitored. t With this instantaneous strain rate ε t The second titanium alloy specimen was subjected to a second-stage superplastic deformation tensile test at a constant strain rate.
[0081] In some embodiments, step S302 may include, but is not limited to, steps S401 to S402.
[0082] Step S401: Obtain the strain rate sensitivity index m value curve corresponding to the preset deformation temperature, identify the peak point in the m value curve, and determine the strain rate corresponding to the peak point as the optimal strain rate.
[0083] Step S402: In the superplastic deformation environment, according to the maximum m-value method of superplastic deformation, with the optimal strain rate as the control benchmark, the first stage of superplastic tensile deformation is carried out on each second titanium alloy sample. During the first stage of superplastic tensile deformation, the strain rate is dynamically adjusted to keep the current m-value within the peak fluctuation range. The peak fluctuation range is determined by the peak point and the preset fluctuation value.
[0084] In some embodiments, a first-stage superplastic deformation tensile test is performed on the first and second titanium alloy specimens by superplastic deformation with the maximum m value. Specifically, the strain rate sensitivity index m value curve of the titanium alloy specimen at the preset deformation temperature is determined by strain rate scanning test, the peak point in the strain rate sensitivity index m value curve is identified, and the strain rate corresponding to the peak point is set as the optimal strain rate. In the superplastic deformation environment, the optimal strain rate is used as the control benchmark to perform a first-stage superplastic tensile deformation on each second titanium alloy specimen or each first titanium alloy specimen. During the first-stage superplastic tensile deformation, the strain rate is dynamically adjusted to keep the current m value within the peak fluctuation range. The peak fluctuation range is determined by the peak point and the preset fluctuation value. For example, the peak fluctuation range is ±10% of the peak point, i.e., [90%*m, 110%*m].
[0085] In some embodiments, step S204 may include, but is not limited to, steps S501 to S502.
[0086] Step S501: In a superplastic deformation environment, using the first constant strain rate as the control reference, perform constant strain rate superplastic tensile deformation on each first titanium alloy specimen.
[0087] Step S502: During the constant strain rate superplastic tensile deformation process, the current strain rate is dynamically adjusted so that the difference between the current strain rate and the first constant strain rate is within a preset range.
[0088] In some embodiments, step S305 may include, but is not limited to, steps S601 to S602.
[0089] Step S601: In a superplastic deformation environment, using the first constant strain rate as the control reference, perform constant strain rate superplastic tensile deformation on each first titanium alloy specimen.
[0090] Step S602: During the constant strain rate superplastic tensile deformation process, the current strain rate is dynamically adjusted so that the difference between the current strain rate and the second constant strain rate is within a preset range.
[0091] In some embodiments, the above method further includes steps S701 to S703.
[0092] Step S701: Dynamically monitor the first deformation effect index and the second deformation effect index. The first deformation effect index includes the deformation effect index of each first titanium alloy sample in the first group of samples during the superplastic tensile deformation process. The second deformation effect index includes the deformation effect index of each second titanium alloy sample in the second group of samples during the superplastic tensile deformation process. The deformation effect index includes elongation, flow stress and deformation uniformity.
[0093] Step S702: Perform data analysis on the first deformation effect index to determine the first superplastic deformation analysis result corresponding to the first superplastic deformation condition;
[0094] Step S703: Perform data analysis on the second deformation effect index to determine the second superplastic deformation analysis result corresponding to the second superplastic deformation condition.
[0095] In some embodiments, flow stress refers to the actual stress required for the titanium alloy specimen to maintain plastic flow during superplastic deformation, which is typically a low stress level. Deformation uniformity refers to the uniformity of strain distribution in the titanium alloy specimen during superplastic deformation.
[0096] Optionally, the flow stress and deformation uniformity of the first titanium alloy specimen in the first and second stages of superplastic tensile deformation are dynamically monitored. Based on the dynamically monitored flow stress and deformation uniformity, corresponding tensile curves are generated. Combined with the tensile curves and elongation of each first titanium alloy specimen, data analysis is performed to determine the first superplastic deformation analysis results corresponding to the first superplastic deformation condition. Similarly, combined with the tensile curves and elongation of each second titanium alloy specimen, data analysis is performed to determine the second superplastic deformation analysis results corresponding to the second superplastic deformation condition.
[0097] The following section provides a detailed description and explanation of the embodiments of the present invention, using a specific scenario of superplastic tensile deformation of a titanium alloy specimen:
[0098] With 775℃ as the preset deformation temperature and the holding time set to 10 min, eight SP700 titanium alloy samples of the same specifications were selected. Six of the SP700 titanium alloy samples were divided into the first group and the second group, and the remaining two SP700 titanium alloy samples were used as the control group.
[0099] Then, the first segmented superplastic deformation strategy (maximum m-value superplastic deformation + equivalent strain rate constant superplastic deformation) was used to perform segmented superplastic deformation treatment on the three SP700 titanium alloy specimens in the first group, and the deformation effect index of these three titanium alloy specimens was dynamically monitored. Similarly, the first segmented superplastic deformation strategy (maximum m-value superplastic deformation + instantaneous strain rate constant superplastic deformation) was used to perform segmented superplastic deformation treatment on the three SP700 titanium alloy specimens in the second group, and the deformation effect index of these three titanium alloy specimens was dynamically monitored. At the same time, the maximum m-value superplastic deformation was used to perform superplastic deformation treatment on the two SP700 titanium alloy specimens in the control group, and the deformation effect index of these two titanium alloy specimens was dynamically monitored. The deformation effect index of the eight titanium alloy specimens is shown in Table 1 below:
[0100] Table 1. Deformation effect index of SP700 titanium alloy specimens
[0101]
[0102]
[0103] As shown in Table 1, SP700 titanium alloy samples A1 and A2 are the control group, SP700 titanium alloy samples C1 to C3 are the first group, and SP700 titanium alloy samples B1 to B3 are the second group. Analysis of the elongation index shows that using either the first or second segmented superplastic deformation strategy to perform segmented superplastic tensile deformation on the titanium alloy samples results in an overall better elongation than single-segment superplastic tensile deformation based on the maximum m-value method. Furthermore, at 775℃, using the second segmented superplastic deformation strategy to perform segmented superplastic tensile deformation on the SP700 titanium alloy samples can achieve an elongation exceeding 3000% (referencing B1) or close to 3000% (referencing B3), fully exploring the ultimate superplastic potential of titanium alloys and greatly improving the superplastic deformation effect of the titanium alloy samples.
[0104] In addition, keeping other conditions unchanged, a control group was added to perform superplastic deformation tensile deformation at a constant strain rate. Preset deformation temperatures were 760℃, 765℃, and 770℃. At each preset deformation temperature, superplastic tensile deformation of the titanium alloy specimens was performed using the first-segment superplastic deformation strategy, the second-segment superplastic deformation strategy, constant strain rate superplastic deformation, and maximum m-value superplastic deformation, respectively. The deformation effect indicators of the titanium alloy specimens were dynamically monitored, as shown in Table 2 below.
[0105] Table 2. Deformation effect indicators of titanium alloy samples at multiple preset deformation temperatures (excerpt)
[0106]
[0107]
[0108] As shown in Table 2, under different preset deformation temperatures, the elongation of titanium alloy specimens subjected to segmented superplastic deformation using either the first or second segmented superplastic deformation strategy is generally superior to that of single-segment superplastic tensile deformation based on the maximum m-value method or the constant strain rate method. The first or second segmented superplastic deformation strategy can achieve elongations of 2500% or higher (refer to the elongations of specimens 8, 9, 10, 18, and 27), while single-segment superplastic tensile deformation based on the maximum m-value method or the constant strain rate method cannot achieve elongations of 2500% or higher. Therefore, the first or second segmented superplastic deformation strategy can significantly improve the superplastic deformation effect of titanium alloy specimens, fully exploring the ultimate superplastic potential of titanium alloys.
[0109] Reference Figure 2 , Figure 2 The collection includes multiple SP700 titanium alloy samples obtained through segmented superplastic deformation or single-segment superplastic tensile deformation treatments, as detailed below:
[0110] Sample: Represents an SP700 titanium alloy specimen that has not undergone superplastic deformation;
[0111] No.5-6, 760℃, Maxm+Equ.SR, δ=2413%: This indicates that with 760℃ as the preset deformation temperature, Maxm+Equ.SR (maximum m value method superplastic deformation + equivalent strain rate constant superplastic deformation), i.e. the first segment superplastic deformation strategy, the SP700 titanium alloy specimen with specimen number No.5-6 was treated to obtain the corresponding elongation δ=2413%.
[0112] No.6-5, 760℃, Maxm+Equ.SR, δ=2413%: This indicates that with 760℃ as the preset deformation temperature, Maxm+Equ.SR (maximum m value method superplastic deformation + equivalent strain rate constant superplastic deformation), i.e. the first segment superplastic deformation strategy, after processing the SP700 titanium alloy specimen with specimen number No.6-5, the corresponding elongation δ=2658% was obtained;
[0113] No.5-3, 770℃, Maxm, δ=2099%: This means that with 770℃ as the preset deformation temperature, Maxm (maximum m value method for superplastic deformation) was used to process the SP700 titanium alloy sample with sample number No.5-3, and the corresponding elongation δ=2099% was obtained.
[0114] No.6-7, 770℃, Maxm+Equ.SR, δ=3101%: This indicates that with 770℃ as the preset deformation temperature, Maxm+Equ.SR (maximum m value method superplastic deformation + equivalent strain rate constant superplastic deformation), i.e. the first segment superplastic deformation strategy, the SP700 titanium alloy specimen with specimen number No.6-7 was treated to obtain the corresponding elongation δ=3101%.
[0115] No.6-9, 775℃, Maxm+Equ.SR, δ=2965%: This indicates that with 775℃ as the preset deformation temperature, Maxm+Equ.SR (maximum m value method superplastic deformation + equivalent strain rate constant superplastic deformation), i.e. the first segment superplastic deformation strategy, the SP700 titanium alloy specimen with specimen number No.6-9 was treated to obtain the corresponding elongation δ=2965%.
[0116] No.6-10, 775℃, Maxm+Equ.SR, δ=2051%: This indicates that with 775℃ as the preset deformation temperature, Maxm+Equ.SR (maximum m value method superplastic deformation + equivalent strain rate constant superplastic deformation), i.e. the first segment superplastic deformation strategy, the SP700 titanium alloy specimen with specimen number No.6-10 was treated to obtain the corresponding elongation δ=2051%.
[0117] No.6-1, 775℃, Maxm+Imme.SR, δ=3088%: This indicates that with a preset deformation temperature of 775℃, the SP700 titanium alloy specimen No.6-1 was treated using Maxm+Imme.SR (maximum m-value method superplastic deformation + instantaneous strain rate constant superplastic deformation), i.e., the second-segment superplastic deformation strategy, and the corresponding elongation δ=3088% was obtained.
[0118] Please see Figure 3 This application also provides a segmented superplastic deformation device for titanium alloys, which can implement the above-mentioned method. The device includes:
[0119] The first module is used to select a number of titanium alloy samples with the same material properties parameters. By random grouping, the multiple titanium alloy samples are divided into a first group of samples and a second group of samples. The material properties parameters include the chemical composition, geometric dimensions and initial microstructure of the material.
[0120] The second module is used to process the first group of samples under the first superplastic deformation conditions. The first superplastic deformation conditions include thermodynamic process parameters, a first segmented superplastic deformation strategy, and a segmented superplastic deformation termination condition. The thermodynamic process parameters include a preset deformation temperature and a holding time. The first segmented superplastic deformation strategy includes superplastic deformation using the maximum m-value method and superplastic deformation using a constant equivalent strain rate.
[0121] The third module is used to process the second group of samples under the second superplastic deformation conditions. The second superplastic deformation conditions include thermodynamic process parameters, the second segmented superplastic deformation strategy, and the segmented superplastic deformation termination conditions. The second segmented superplastic deformation strategy includes superplastic deformation using the maximum m-value method and superplastic deformation with constant instantaneous strain rate.
[0122] It is understood that the content of the above method embodiments is applicable to the present device embodiments. The specific functions implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.
[0123] This application also provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method. This electronic device can be any smart terminal, including tablet computers, in-vehicle computers, etc.
[0124] It is understood that the content of the above method embodiments is applicable to this device embodiment. The specific functions implemented by this device embodiment are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.
[0125] Please see Figure 4 , Figure 4 The hardware structure of an electronic device according to another embodiment is illustrated. The electronic device includes:
[0126] The processor 901 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application.
[0127] The memory 902 can be implemented as a read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory 902 can store the operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory 902 and is called and executed by the processor 901 using the methods described in the embodiments of this application.
[0128] The input / output interface 903 is used to implement information input and output;
[0129] The communication interface 904 is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).
[0130] Bus 905 transmits information between various components of the device (e.g., processor 901, memory 902, input / output interface 903, and communication interface 904);
[0131] The processor 901, memory 902, input / output interface 903, and communication interface 904 are connected to each other within the device via bus 905.
[0132] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method.
[0133] It is understood that the content of the above method embodiments is applicable to this storage medium embodiment. The specific functions implemented in this storage medium embodiment are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those achieved in the above method embodiments.
[0134] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.
[0135] It is understood that the content of the above method embodiments is applicable to the embodiments of this program product. The specific functions implemented by the embodiments of this program product are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.
[0136] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.
[0137] The segmented superplastic deformation method, apparatus, electronic device, storage medium, and program product for titanium alloys provided in this application embodiment can achieve automated superplastic deformation of titanium alloys by selecting a corresponding preset number of titanium alloy samples with the same material property parameters, randomly grouping the multiple titanium alloy samples into a first group of samples and a second group of samples, placing the first group of samples under a first superplastic deformation condition for processing, and placing the second group of samples under a second superplastic deformation condition for processing. This can improve the efficiency of superplastic deformation, reduce costs, enhance the superplastic deformation effect of titanium alloys, and fully explore the ultimate superplastic potential of titanium alloys.
[0138] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.
[0139] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.
[0140] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.
[0141] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.
[0142] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0143] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.
[0144] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0145] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0146] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0147] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0148] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.
Claims
1. A method for segmented superplastic deformation of titanium alloys, characterized in that, The method includes the following steps: Select a number of titanium alloy samples with the same material properties parameters, and divide the titanium alloy samples into a first group and a second group by random grouping. The material properties parameters include the chemical composition, geometric dimensions and initial microstructure of the material. The first group of samples was subjected to a first superplastic deformation condition, which included thermodynamic process parameters, a first segmented superplastic deformation strategy, and a segmented superplastic deformation termination condition. The thermodynamic process parameters included a preset deformation temperature and a holding time. The first segmented superplastic deformation strategy included superplastic deformation using the maximum m-value method and superplastic deformation using a constant equivalent strain rate. The second group of samples was subjected to a second superplastic deformation condition, which included the thermodynamic process parameters, the second segmented superplastic deformation strategy, and the segmented superplastic deformation termination condition. The second segmented superplastic deformation strategy included the maximum m-value method for superplastic deformation and instantaneous strain rate constant superplastic deformation.
2. The method according to claim 1, characterized in that, The step of placing the first group of samples under the first superplastic deformation condition includes: Each of the first titanium alloy samples in the first group of samples is placed in a superplastic deformation environment corresponding to the thermodynamic process parameters. In the superplastic deformation environment, according to the superplastic deformation method of the maximum m value, each of the first titanium alloy samples is subjected to a first stage of superplastic tensile deformation, and the first superplastic deformation tensile force corresponding to each of the first titanium alloy samples during the first stage of superplastic tensile deformation is dynamically monitored. When the first superplastic deformation tensile force is detected to be less than the preset first tensile force threshold, the first stage of superplastic tensile deformation is stopped, and the amount of superplastic tensile deformation and the tensile time corresponding to the first titanium alloy sample are determined. Based on the superplastic tensile deformation and tensile time corresponding to each of the first titanium alloy specimens, the equivalent strain rate corresponding to each of the first titanium alloy specimens is determined, and the equivalent strain rate is determined as the first constant strain rate. Based on the first constant strain rate corresponding to each of the first titanium alloy specimens, a second-stage superplastic tensile deformation is performed on each of the first titanium alloy specimens. The second superplastic deformation tensile force corresponding to each of the first titanium alloy samples during the second stage of superplastic tensile deformation is dynamically monitored. When the second superplastic deformation tensile force is detected to be less than the preset second tensile force threshold, the second stage of superplastic tensile deformation is stopped.
3. The method according to claim 1, characterized in that, The step of treating the second group of samples under the second superplastic deformation condition includes: Each of the second titanium alloy samples in the second group of samples was placed in a superplastic deformation environment corresponding to the thermodynamic process parameters. In the superplastic deformation environment, each of the second titanium alloy specimens is subjected to first-stage superplastic tensile deformation according to the maximum m-value method superplastic deformation. The first superplastic deformation tensile force corresponding to each of the second titanium alloy specimens during the first stage of superplastic tensile deformation is dynamically monitored. When the first superplastic deformation tensile force is detected to be less than the preset first tensile force threshold, the first stage of superplastic tensile deformation is stopped, and the instantaneous strain rate of the second titanium alloy specimen at the stop time of the first stage of superplastic tensile deformation is monitored. The instantaneous strain rate corresponding to each of the second titanium alloy samples is determined as the second constant strain rate; Based on the second constant strain rate corresponding to each of the titanium alloy specimens, the second stage of superplastic tensile deformation is performed on each of the second titanium alloy specimens, and the second superplastic deformation tensile force corresponding to each of the second titanium alloy specimens is dynamically monitored during the second stage of superplastic tensile deformation. When the second superplastic deformation tensile force is detected to be less than the preset second tensile force threshold, the second stage of superplastic tensile deformation is stopped.
4. The method according to claim 3, characterized in that, In the superplastic deformation environment, according to the maximum m-value method of superplastic deformation, the second titanium alloy specimens undergo a first-stage superplastic tensile deformation, including: Obtain the strain rate sensitivity index m-value curve corresponding to the preset deformation temperature, identify the peak point in the m-value curve, and determine the strain rate corresponding to the peak point as the optimal strain rate. In the superplastic deformation environment, according to the maximum m-value method of superplastic deformation, with the optimal strain rate as the control benchmark, each of the second titanium alloy specimens undergoes a first stage of superplastic tensile deformation. During the first stage of superplastic tensile deformation, the strain rate is dynamically adjusted to keep the current m-value within the peak fluctuation range. The peak fluctuation range is determined by the peak point and the preset fluctuation value.
5. The method according to claim 1, characterized in that, The method further includes: The first deformation effect index and the second deformation effect index are dynamically monitored. The first deformation effect index includes the deformation effect index of each first titanium alloy sample in the first group of samples during the superplastic tensile deformation process. The second deformation effect index includes the deformation effect index of each second titanium alloy sample in the second group of samples during the superplastic tensile deformation process. The deformation effect index includes elongation, flow stress and deformation uniformity. Data analysis is performed on the first deformation effect index to determine the first superplastic deformation analysis result corresponding to the first superplastic deformation condition. Data analysis is performed on the second deformation effect index to determine the second superplastic deformation analysis result corresponding to the second superplastic deformation condition.
6. The method according to claim 2, characterized in that, The step of subjecting each of the first titanium alloy specimens to a second-stage superplastic tensile deformation according to the first constant strain rate corresponding to each of the first titanium alloy specimens includes: In the superplastic deformation environment, each of the first titanium alloy specimens is subjected to constant strain rate superplastic tensile deformation with the first constant strain rate as the control reference. During the constant strain rate superplastic tensile deformation process, the current strain rate is dynamically adjusted so that the difference between the current strain rate and the first constant strain rate is within a preset range.
7. The method according to claim 2, characterized in that, The equivalent strain rate is expressed by the following formula: Where, ε eq ε is the equivalent strain rate, ε is the superplastic tensile deformation, and t is the tensile time.
8. A segmented superplastic deformation device for titanium alloys, characterized in that, The device includes: The first module is used to select a number of titanium alloy samples with the same material properties parameters, and to divide the titanium alloy samples into a first group and a second group by random grouping. The material properties parameters include the chemical composition, geometric dimensions and initial microstructure of the material. The second module is used to process the first group of samples under the first superplastic deformation conditions. The first superplastic deformation conditions include thermodynamic process parameters, a first segmented superplastic deformation strategy, and a segmented superplastic deformation termination condition. The thermodynamic process parameters include a preset deformation temperature and a holding time. The first segmented superplastic deformation strategy includes superplastic deformation using the maximum m-value method and superplastic deformation using a constant equivalent strain rate. The third module is used to process the second group of samples under the second superplastic deformation conditions. The second superplastic deformation conditions include the thermodynamic process parameters, the second segmented superplastic deformation strategy, and the segmented superplastic deformation termination conditions. The second segmented superplastic deformation strategy includes the maximum m-value method superplastic deformation and instantaneous strain rate constant superplastic deformation.
9. An electronic device, characterized in that, The electronic device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the method according to any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 7.