A Stress Testing Method for Titanium Alloy Materials under High-Temperature Complex Environments

Abstract

The present invention relates to the technical field of stress testing, and specifically relates to a method for stress testing titanium alloy materials in a high-temperature complex environment, including: obtaining a data sequence formed by a number of surface distance data of a titanium alloy sample at different temperatures, and using the degree of change of the data in the data sequence to obtain the structural uniformity index and the recovery characteristic index of the titanium alloy sample at different temperatures, and then determining the quality attributes of the titanium alloy sample, calculating the mass change factor of the titanium alloy sample at different temperatures, obtaining a mass change factor sequence, and further constructing a final quality evaluation index of the titanium alloy sample according to the change situation of the data in the mass change factor sequence to evaluate the quality of the titanium alloy sample. By constructing the final quality evaluation index of the titanium alloy sample, the present invention obtains more accurate quality indexes of the titanium alloy under temperature range testing, and comprehensively evaluates the performance and stability of the titanium alloy material under high-temperature conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of stress testing, and particularly relates to a method for stress testing of titanium alloy materials in a high-temperature complex environment. Background Art

[0002] Titanium alloy is an alloy formed by mixing titanium with other metallic elements (such as aluminum, vanadium, iron, chromium, etc.) in a certain proportion. It is widely used in industrial manufacturing and other fields due to its excellent mechanical properties and corrosion resistance. In order to ensure that titanium alloy can meet the usage requirements in a specific environment and its corresponding physical and chemical properties can meet the corresponding standards, it is usually necessary to conduct tests on aspects such as stress of titanium alloy materials. Through these tests, the performance of titanium alloy in practical applications, as well as its load-bearing capacity and durability under extreme conditions, etc., can be evaluated to ensure that the titanium alloy materials meet the production and application standards.

[0003] When stress testing titanium alloy at high temperature, the analysis of the stress distribution of titanium alloy and the degree of its influence by temperature, etc. is not comprehensive and accurate enough, resulting in deviations in the evaluation of the surface stress test results of titanium alloy in a high-temperature environment, and further affecting the accuracy of its production and application standards, evaluation and classification, etc. or the production efficiency of titanium alloy materials, etc. Summary of the Invention

[0004] The present invention provides a method for stress testing of titanium alloy materials in a high-temperature complex environment to solve the existing problems.

[0005] The method for stress testing of titanium alloy materials in a high-temperature complex environment of the present invention adopts the following technical solutions:

[0006] An embodiment of the present invention provides a method for stress testing of titanium alloy materials in a high-temperature complex environment, and the method includes the following steps:

[0007] Within a set temperature range with a set change step size, obtain a data sequence of a plurality of surface distance data of a titanium alloy sample at different temperatures. The central data of the data sequence is the surface distance data at the force application point position of the titanium alloy sample, and the data sequence includes a reference sequence, a compression deformation sequence, and a pressure release recovery sequence;

[0008] According to the similarity relationship of the surface distance data on both sides of the central data in the compression deformation sequence of the titanium alloy sample, obtain the structural uniformity index of the titanium alloy sample at different temperatures; according to the difference of the surface distance data at the same position in the reference sequence and the pressure release recovery sequence of the titanium alloy sample, obtain the recovery characteristic index of the titanium alloy sample at different temperatures; and then determine the quality attribute of the titanium alloy sample, calculate the mass change factor of the titanium alloy sample at different temperatures, and obtain a mass change factor sequence;

[0009] Construct the final quality evaluation index of the titanium alloy sample according to the variation of the data in the mass change factor sequence of the titanium alloy sample, and evaluate the quality of the titanium alloy sample.

[0010] Further, the specific method for obtaining the data sequence formed by a number of surface distance data of the titanium alloy sample at different temperatures includes:

[0011] At any preset temperature, use a number of distance sensors to measure the distances from different positions of the titanium alloy sample to the material placement table when no pressure is applied, and the formed surface distance data sequence is recorded as the reference sequence; the surface distance data sequence of the titanium alloy sample detected after applying pressure is recorded as the compression deformation sequence; the surface distance data sequence of the titanium alloy sample detected after removing the pressure is recorded as the pressure removal recovery sequence, and the obtained reference sequence, compression deformation sequence, and pressure removal recovery sequence are collectively referred to as the data sequence; the contact position of the pressure push rod and the titanium alloy sample is recorded as the force application point, and the surface distance data of the force application point is located in the center of the data sequence; obtain the data sequences of the titanium alloy sample at different temperatures.

[0012] Further, the specific method for obtaining the structural uniformity index of the titanium alloy sample at different temperatures according to the similarity relationship of the surface distance data on both sides of the central data in the compression deformation sequence of the titanium alloy sample includes:

[0013] Utilize the difference between the surface distance data on both sides of the central data in the compression deformation sequence of the titanium alloy sample to construct the structural uniformity factor of the titanium alloy sample;

[0014] Construct the structural uniformity index of the titanium alloy sample according to the structural uniformity factor of the titanium alloy sample and the Pearson correlation coefficient between the surface distance data on both sides of the central data. The structural uniformity factor of the titanium alloy sample is negatively correlated with the structural uniformity index of the titanium alloy sample, and the Pearson correlation coefficient between the surface distance data on both sides of the central data of the titanium alloy sample is positively correlated with the structural uniformity index of the titanium alloy sample;

[0015]

[0016] Among them, represents the structural uniformity index of the titanium alloy sample at the th temperature, represents the structural uniformity factor of the titanium alloy sample at the th temperature, represents the Pearson correlation coefficient between the surface distance data on both sides of the force application point of the titanium alloy sample at the th temperature, represents the absolute value symbol; represents the exponential function with the natural constant as the base.

[0017] Furthermore, the calculation of the structural uniformity factor of the titanium alloy sample specifically includes:

[0018] In the compression deformation sequence of the titanium alloy sample at different temperatures, calculate the difference between the surface distance data on both sides of the central data, and denote the average value of the absolute value of the difference between the surface distance data on both sides of the central data as the structural uniformity factor of the titanium alloy sample.

[0019] Furthermore, the method for obtaining the recovery characteristic index of the titanium alloy sample at different temperatures according to the difference in the surface distance data at the same position in the reference sequence and the pressure-release recovery sequence of the titanium alloy sample specifically includes:

[0020]

[0021] Among them, represents the recovery characteristic index of the titanium alloy sample at the th temperature, represents the surface distance data detected at the th position in the reference sequence at the th temperature, represents the surface distance data detected at the th position in the pressure-release recovery sequence at the th temperature; represents the number of data points included in the data sequence; represents the magnitude of the pressure applied to the titanium alloy sample, represents the exponential function with the natural constant as the base.

[0022] Furthermore, the method for determining the quality attribute of the titanium alloy sample specifically includes:

[0023] Combining the structural uniformity index and the recovery characteristic index of the titanium alloy sample to determine the quality attribute of the titanium alloy sample. The structural uniformity index and the recovery characteristic index of the titanium alloy sample are both positively correlated with the quality attribute of the titanium alloy sample.

[0024] Furthermore, the method for calculating the mass change factor of the titanium alloy sample at different temperatures specifically includes:

[0025] Using the variation relationship between the quality attribute of the titanium alloy sample and different temperature changes, calculate the mass change factor of the titanium alloy sample at different temperatures;

[0026]

[0027] Among them, represents the mass change factor of the titanium alloy sample under the influence of the th temperature, represents the The mass attributes of the titanium alloy sample at a certain temperature, denotes the mass attributes of the titanium alloy sample at a certain temperature, denotes the certain temperature, The certain temperature, denotes the absolute value symbol, denotes the normalization function.

[0028] Furthermore, the specific method for obtaining the mass change factor sequence includes:

[0029] Calculate the mass change factors of the titanium alloy sample at several different temperatures within the temperature range, and form a sequence in the order of temperature magnitude, denoted as the mass change factor sequence.

[0030] Furthermore, the specific method for constructing the final mass evaluation index of the titanium alloy sample according to the change situation of the data in the mass change factor sequence of the titanium alloy sample includes:

[0031]

[0032] wherein, denotes the final mass evaluation index of the titanium alloy sample, denotes the value of the th data point in the mass change factor sequence; denotes the mean value of the data in the mass change factor sequence, denotes the number of data points in the mass change factor sequence, denotes the absolute value symbol, denotes the normalization function.

[0033] Furthermore, the specific method for evaluating the mass of the titanium alloy sample includes:

[0034] Preset a threshold , and judge the quality of the titanium alloy sample according to the final mass evaluation index of the titanium alloy sample. When , mark the titanium alloy sample as a qualified product; when , mark the titanium alloy sample as an unqualified product.

[0035] The beneficial effects of the technical solution of the present invention are as follows: Compared with the high-temperature stress test of traditional titanium alloy materials, the embodiments of the present invention combine the uniformity and recovery degree of the structure of titanium alloy samples under the influence of different temperatures, analyze the surface stress test results of titanium alloy under high-temperature environment, and then determine the quality attributes of titanium alloy samples at different temperatures. Further, the quality change factors of titanium alloy samples at different temperatures are calculated. According to the stability of the data in the quality change factor sequence of titanium alloy samples, the final quality evaluation index of titanium alloy samples is constructed to evaluate the quality of titanium alloy samples, so as to obtain the quality index of titanium alloy under the test of the current environmental temperature range, provide a more accurate reference value for whether it can meet the application environment or production and subsequent processing standards, comprehensively evaluate the performance and stability of titanium alloy materials under high-temperature conditions, and ensure the safety and reliability of the materials in actual applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0037] Figure 1 It is a flowchart of the steps of a method for testing the stress of titanium alloy materials in a high-temperature complex environment according to the present invention;

[0038] Figure 2 It is a schematic diagram of a pressure detection device according to the present invention;

[0039] Figure 2 In it, 1 represents a plurality of distance sensors with evenly spaced intervals; 2 represents the entire measuring device; 3 represents the fixed sliding rod of the pressure push rod; 4 represents the pressure control system; 5 represents the pressure push rod; 6 represents the pressure device support table; 7 represents the material placement table; 8 represents the sample to be tested. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and effects of a method for testing the stress of titanium alloy materials in a high-temperature complex environment according to the present invention. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs.

[0042] The following specifically describes the specific solution of a method for stress testing of titanium alloy materials in a high-temperature and complex environment provided by the present invention in conjunction with the accompanying drawings.

[0043] Please refer to Figure 1 , which shows a flowchart of the steps of a method for stress testing of titanium alloy materials in a high-temperature and complex environment provided by an embodiment of the present invention. The method includes the following steps:

[0044] Step S001: Obtain a data sequence of the titanium alloy sample at different temperatures using a pressure detection device.

[0045] It should be noted that titanium alloy materials generally need to have certain physical properties to meet the standards for production and use in specific application fields. High-temperature-resistant titanium alloy materials need to have the characteristic of high-temperature resistance. Therefore, it is necessary to test them under different high-temperature variables, and then analyze the test data to accurately quantify the quality indicators of the titanium alloy materials at high temperatures, so as to facilitate more accurate evaluation of them later.

[0046] Specifically, in order to implement a method for stress testing of titanium alloy materials in a high-temperature and complex environment proposed in this embodiment, it is first necessary to collect the detection data of the titanium alloy sample in different states. The specific process is as follows:

[0047] As Figure 2 shown is a schematic diagram of a pressure detection device of the present invention. Among them, serial number 1 represents a number of evenly spaced distance sensors, serial number 2 represents the entire measuring device, serial number 6 represents the pressure device support platform, serial number 7 represents the material placement platform, serial number 8 represents the sample to be tested, and serial numbers 3, 4, and 5 form a pressure application control device. Among them, serial number 3 represents the fixed slide rod of the pressure push rod, serial number 4 represents the pressure control system, and serial number 5 represents the pressure push rod.

[0048] The specific measurement principle is to place the sample to be tested on the material placement platform, adjust the pressure control device so that the pressure push rod is directly above the center of the sample to be tested, and at several different temperatures, apply a set pressure to the sample to be tested through the pressure push rod, and use a number of distance sensors to detect the distance change between the sample to be tested and the material placement platform to obtain a series of surface distance data of the sample to be tested from the material placement platform.

[0049] At any preset temperature, use a number of distance sensors to measure the distances from different positions of the titanium alloy sample to the material placement table when no pressure is applied. The surface distance data sequence formed is recorded as the reference sequence; the surface distance data sequence of the titanium alloy sample detected after applying pressure is recorded as the compression deformation sequence; the surface distance data sequence of the titanium alloy sample detected after removing the pressure is recorded as the pressure-removing recovery sequence. The obtained reference sequence, compression deformation sequence, and pressure-removing recovery sequence are collectively referred to as the data sequence; the contact position between the pressure push rod and the titanium alloy sample is recorded as the stress point, and the surface distance data of the stress point is located at the center of the data sequence and is recorded as the central data; within a set temperature range with a set change step size, obtain the data sequence formed by the surface distance data of the titanium alloy sample at different temperatures.

[0050] It should be noted that a distance sensor is provided directly below the stress point of the titanium alloy sample, and the distance sensor is located at the center of the several sensors provided, and is used to measure the surface distance data at the stress point position.

[0051] It should be noted that in this embodiment, the preset temperature range is , the change step size is 50 °C, and the given pressure is 100 Newtons of pressure, which can be adjusted according to the actual situation and is not specifically limited in this embodiment.

[0052] So far, the reference sequence, compression deformation sequence, and pressure-removing recovery sequence of the surface distance data of the titanium alloy sample at different temperatures are obtained through the above method.

[0053] Step S002: Obtain the structural uniformity index of the titanium alloy sample at different temperatures according to the similarity relationship of the surface distance data on both sides of the central data in the compression deformation sequence of the titanium alloy sample; obtain the recovery characteristic index of the titanium alloy sample at different temperatures according to the difference of the surface distance data at the same position in the reference sequence and the pressure-removing recovery sequence of the titanium alloy sample; then determine the quality attribute of the titanium alloy sample, calculate the quality change factor of the titanium alloy sample at different temperatures, and obtain the quality change factor sequence.

[0054] Specifically, in step 2.1, obtain the structural uniformity index of the titanium alloy sample at different temperatures according to the similarity relationship of the surface distance data on both sides of the central data in the compression deformation sequence of the titanium alloy sample.

[0055] It should be noted that when the structural distribution of the titanium alloy sample is uniform, under the action of pressure, the intermolecular forces on the surface of the titanium alloy sample exhibit a certain degree of uniformity and smoothness. Specifically, when a certain pressure is applied to the titanium alloy sample, the pressures on the materials on both sides of the force application position are similar with respect to the force application position. Therefore, applying a certain pressure to the titanium alloy test sample, collecting the deformation curves of the titanium alloy sample under different temperature conditions, and obtaining the symmetry of the titanium alloy sample with respect to the center point of the applied pressure and the smoothness of the curve change is also relatively good.

[0056] Utilize the similarity relationship of the surface distance data on both sides of the central data in the compression deformation sequence of the titanium alloy sample to construct the structural uniformity factor of the titanium alloy sample.

[0057] In the compression deformation sequence of the titanium alloy sample at different temperatures, calculate the difference between the surface distance data on both sides of the central data, and denote the average value of the absolute values of the differences between the surface distance data on both sides of the central data as the structural uniformity factor of the titanium alloy sample.

[0058] As an embodiment, the calculation method of the structural uniformity factor of the titanium alloy sample is as follows:

[0059]

[0060] Among them, represents the structural uniformity factor of the titanium alloy sample at the th temperature, represents the surface distance data corresponding to the rd position on the left side of the force application point in the compression deformation sequence of the titanium alloy sample at the th temperature, represents the surface distance data corresponding to the th position on the right side of the force application point in the compression deformation sequence of the titanium alloy sample at the th temperature, represents the number of surface distance data on both sides of the force application point in the compression deformation sequence, represents the absolute value symbol.

[0061] Construct the structural uniformity index of the titanium alloy sample according to the Pearson correlation coefficient between the structural uniformity factor of the titanium alloy sample and the surface distance data on both sides of the central data. The structural uniformity factor of the titanium alloy sample is inversely proportional to the structural uniformity index of the titanium alloy sample, and the Pearson correlation coefficient between the surface distance data on both sides of the central data of the titanium alloy sample is directly proportional to the structural uniformity index of the titanium alloy sample.

[0062] As an embodiment, the specific calculation method of the structural uniformity index of the titanium alloy sample is as follows:

[0063]

[0064] Among them, represents the structural uniformity index of the titanium alloy sample at the th temperature, represents the structural uniformity factor of the titanium alloy sample at the th temperature, represents the Pearson correlation coefficient between the surface distance data on both sides of the force application point of the titanium alloy sample at the th temperature, represents the absolute value symbol, represents the exponential function with the natural constant as the base.

[0065] It should be noted that if the absolute value of the Pearson correlation coefficient between the surface distance data on the left and right sides of the force application point of the titanium alloy sample approaches 1 more, it indicates that the correlation between the left and right sides of the force application point of the titanium alloy sample is better, that is, the dispersion uniformity of the titanium alloy sample after being subjected to forces on both sides of the force application point is better, indicating that the structural uniformity of the titanium alloy sample is better; the greater the average value of the absolute value of the difference between the data on the left and right sides of the force application point in the compression deformation sequence obtained after applying pressure to the titanium alloy sample, the greater the difference in the dispersed pressure received at each part position on both sides of the force application point, indicating that the result uniformity of the titanium alloy sample is worse.

[0066] Thus far, the structural uniformity index of the titanium alloy sample is obtained through the above method.

[0067] Step 2.2, according to the difference in the surface distance data at the same position in the reference sequence and the pressure removal recovery sequence of the titanium alloy sample, obtain the recovery characteristic index of the titanium alloy sample at different temperatures.

[0068] It should be noted that when the titanium alloy sample is at different test temperatures, the internal molecular structure will be affected by temperature to a certain extent, and there is a certain interference in the response degree of the titanium alloy sample to pressure. Therefore, by comparing and analyzing the pressure removal recovery sequence and the reference sequence of the titanium alloy sample after removing the pressure, and determining the recovery characteristic index of the titanium alloy sample, the stability and fatigue resistance of the titanium alloy sample to temperature can be shown.

[0069] As an embodiment, the specific calculation method of the recovery characteristic index of the titanium alloy sample is:

[0070]

[0071] Among them, represents the recovery characteristic index of the titanium alloy sample at the th temperature, represents the th temperature in the reference sequence and the The surface distance data detected at a certain position indicating the th temperature in the pressure-relief recovery sequence, and the surface distance data detected at the th position; indicating the number of data points included in the data sequence; indicating the magnitude of the pressure applied to the titanium alloy sample, indicating the exponential function with the natural constant as the base.

[0072] It should be noted that the difference in the surface distance data values at the same position between the reference sequence and the pressure-relief recovery sequence at the same temperature indicates the degree of recovery of the deformation amount at the said position after the pressure is removed. The smaller the difference, the better the deformation recovery degree of the titanium alloy sample at the th temperature.

[0073] Step 2.3: Combine the structural uniformity index and the recovery characteristic index of the titanium alloy sample to determine the quality attribute of the titanium alloy sample, calculate the mass change factor of the titanium alloy sample at different temperatures, and obtain the mass change factor sequence.

[0074] It should be noted that when the titanium alloy is subjected to different temperatures, its pressure-induced deformation degree and pressure-relief recovery degree will be affected by temperature. Therefore, for the current titanium alloy test sample, calculate its quality attribute index to facilitate the subsequent determination of the influence degree of different temperatures on the quality attribute of the titanium alloy sample.

[0075] Combine the structural uniformity index and the recovery characteristic index of the titanium alloy sample to determine the quality attribute of the titanium alloy sample. The structural uniformity index and the recovery characteristic index of the titanium alloy sample are both positively correlated with the quality attribute of the titanium alloy sample.

[0076] As an embodiment, the specific calculation method of the quality attribute of the titanium alloy sample is:

[0077]

[0078] where represents the quality attribute of the titanium alloy sample at the th temperature, represents the structural uniformity index of the titanium alloy sample at the th temperature, represents the recovery characteristic index of the titanium alloy sample at the th temperature.

[0079] Utilize the change relationship between the quality attribute of the titanium alloy sample and different temperature changes to calculate the mass change factor of the titanium alloy sample at different temperatures.

[0080] As an embodiment, the specific calculation method for the degree to which the mass attributes of a titanium alloy sample are affected by temperature is as follows:

[0081]

[0082] Among them, represents the mass change factor of the titanium alloy sample under the influence of the th temperature, represents the mass attribute of the titanium alloy sample at the th temperature, represents the mass attribute of the titanium alloy sample at the th temperature, represents the th temperature, The th temperature, represents the absolute value symbol, represents the normalization function.

[0083] Calculate the mass change factors of the titanium alloy sample at several different temperatures within the temperature range, and form a sequence in the order of temperature magnitude, denoted as the mass change factor sequence.

[0084] So far, the mass change factor sequence of the titanium alloy sample is obtained through the above method.

[0085] Step S003: According to the change situation of the data in the mass change factor sequence of the titanium alloy sample, construct the final quality evaluation index of the titanium alloy sample to evaluate the quality of the titanium alloy sample.

[0086] It should be noted that the better the stability of the data in the mass change factor sequence, the more stable the mass attributes of the titanium alloy sample under temperature changes, and the better the product quality.

[0087] As an embodiment, the specific calculation method for the final quality evaluation index of the titanium alloy sample is as follows:

[0088]

[0089] Among them, represents the final quality evaluation index of the titanium alloy sample, represents the value of the th data point in the mass change factor sequence; represents the mean value of the data points in the mass change factor sequence, represents the number of data points in the mass change factor sequence, represents the absolute value symbol, represents the normalization function.

[0090] It should be noted that, the smaller the mean value of the data points in the mass change factor sequence, the smaller the degree of influence of the temperature on the mass attribute of the titanium alloy sample, and the better the quality; the smaller the absolute value of the difference between the value of the data point in the mass change factor sequence and the mean value of the sequence data, the better the stability of the material of the titanium alloy sample during the temperature change process, and the better the quality.

[0091] Preset threshold , judge the quality of the titanium alloy sample according to the final quality evaluation index of the titanium alloy sample. When , record the hardware sample as a qualified product; when , record the hardware product as an unqualified product.

[0092] It should be noted that, in this embodiment, the threshold of the final quality evaluation index for screening the quality of the titanium alloy sample is preset according to experience , and it can be adjusted according to the actual situation, and this embodiment does not make specific limitations.

[0093] So far, through the above method, the quality detection of the titanium alloy sample in the high-temperature complex environment is obtained, and this embodiment is completed.

[0094] Compared with the traditional high-temperature stress test of titanium alloy materials, the embodiment of the present invention combines the uniformity and recovery degree of the structure of the titanium alloy sample under the influence of different temperatures, analyzes the surface stress test results of the titanium alloy in the high-temperature environment, and then determines the mass attributes of the titanium alloy sample at different temperatures. Further, calculate the mass change factor of the titanium alloy sample at different temperatures. According to the stability of the data in the mass change factor sequence of the titanium alloy sample, construct the final quality evaluation index of the titanium alloy sample, evaluate the quality of the titanium alloy sample, so as to obtain the quality index of the titanium alloy under the current environmental temperature range test, provide a more accurate reference value for whether it can meet the application environment or production and subsequent processing standards, comprehensively evaluate the performance and stability of the titanium alloy material under high-temperature conditions, and ensure the safety and reliability of the material in actual applications.

[0095] It should be noted that, the model used in this embodiment is only used to represent the negative correlation relationship and restrict the result of the model output to be within the interval. Specifically in implementation, it can be replaced with other models with the same purpose. This embodiment only takes the model as an example for description, and does not make specific limitations on it. Among them, refers to the input of this model.

[0096] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for stress testing of titanium alloy materials under high-temperature complex environments, characterized in that, The method includes the following steps: Within a set temperature range with a set change step, obtain a data sequence of a number of surface distance data of a titanium alloy sample at different temperatures. The central data of the data sequence is the surface distance data at the stress application point of the titanium alloy sample. The data sequence includes a reference sequence, a compressive deformation sequence, and a post-pressure recovery sequence. According to the similarity relationship of the surface distance data on both sides of the central data in the compressive deformation sequence of the titanium alloy sample, obtain the structural uniformity index of the titanium alloy sample at different temperatures. According to the difference of the surface distance data at the same position in the reference sequence and the post-pressure recovery sequence of the titanium alloy sample, obtain the recovery characteristic index of the titanium alloy sample at different temperatures. Furthermore, determine the quality attributes of the titanium alloy sample, calculate the mass change factor of the titanium alloy sample at different temperatures, and obtain a mass change factor sequence. According to the variation of the data in the mass change factor sequence of the titanium alloy sample, construct the final quality evaluation index of the titanium alloy sample to evaluate the quality of the titanium alloy sample.

2. The stress testing method for titanium alloy materials under high-temperature complex environments according to claim 1, characterized in that The specific method for obtaining the data sequence of a number of surface distance data of the titanium alloy sample at different temperatures includes: At any preset temperature, use a number of distance sensors to measure the distances from different positions of the titanium alloy sample to the material placement table when no pressure is applied. The formed surface distance data sequence is recorded as the reference sequence. The surface distance data sequence of the titanium alloy sample detected after applying pressure is recorded as the compressive deformation sequence. The surface distance data sequence of the titanium alloy sample detected after removing the pressure is recorded as the post-pressure recovery sequence. The obtained reference sequence, compressive deformation sequence, and post-pressure recovery sequence are collectively referred to as the data sequence. The contact position of the pressure push rod and the titanium alloy sample is recorded as the stress application point, and the surface distance data of the stress application point is located at the center of the data sequence. Obtain the data sequences of the titanium alloy sample at different temperatures.

3. The stress testing method of titanium alloy materials under high-temperature complex environments according to claim 1, characterized in that The specific method for obtaining the structural uniformity index of the titanium alloy sample at different temperatures according to the similarity relationship of the surface distance data on both sides of the central data in the compressive deformation sequence of the titanium alloy sample includes: Use the difference between the surface distance data on both sides of the central data in the compressive deformation sequence of the titanium alloy sample to construct the structural uniformity factor of the titanium alloy sample. According to the Pearson correlation coefficient between the structural uniformity factor of the titanium alloy sample and the surface distance data on both sides of the central data, construct the structural uniformity index of the titanium alloy sample. The structural uniformity factor of the titanium alloy sample is negatively correlated with the structural uniformity index of the titanium alloy sample, and the Pearson correlation coefficient between the surface distance data on both sides of the central data of the titanium alloy sample is positively correlated with the structural uniformity index of the titanium alloy sample. Among them, represents the structural uniformity index of the titanium alloy sample at the th temperature, represents the structural uniformity factor of the titanium alloy sample at the th temperature, represents the Pearson correlation coefficient between the surface distance data on both sides of the stress point of the titanium alloy sample at the th temperature, represents the absolute value symbol; represents the exponential function with the natural constant as the base.

4. The stress testing method for titanium alloy materials in a high-temperature complex environment according to claim 3, characterized in that The specific calculation for constructing the structural uniformity factor of the titanium alloy sample includes: In the compressive deformation sequence of the titanium alloy sample at different temperatures, calculate the difference between the surface distance data on both sides of the central data, and record the average value of the absolute values of the differences between the surface distance data on both sides of the central data as the structural uniformity factor of the titanium alloy sample.

5. The stress testing method for titanium alloy materials in a high-temperature complex environment according to claim 1, characterized in that, Obtaining the recovery characteristic indexes of the titanium alloy sample at different temperatures according to the differences in the surface distance data at the same position in the reference sequence and the pressure-relieving recovery sequence of the titanium alloy sample, and the specific method includes: Among them, represents the recovery characteristic index of the titanium alloy sample at the th temperature, represents the surface distance data detected at the th temperature and the th position in the reference sequence, represents the surface distance data detected at the th temperature and the th position in the pressure relief recovery sequence; represents the number of data points included in the data sequence; represents the magnitude of the pressure applied to the titanium alloy sample, represents the exponential function with the natural constant as the base.

6. The stress testing method of titanium alloy materials under high-temperature complex environments according to claim 1, characterized in that Determining the quality attributes of the titanium alloy sample, and the specific method includes: Combining the structural uniformity index and the recovery characteristic index of the titanium alloy sample to determine the quality attributes of the titanium alloy sample, and both the structural uniformity index and the recovery characteristic index of the titanium alloy sample are positively correlated with the quality attributes of the titanium alloy sample.

7. The method for stress testing of titanium alloy materials in a high-temperature complex environment according to claim 6, characterized in that Calculating the mass change factor of the titanium alloy sample at different temperatures, and the specific method includes: Using the change relationship between the quality attributes of the titanium alloy sample and different temperature changes to calculate the mass change factor of the titanium alloy sample at different temperatures; Among them, represents the mass change factor of the titanium alloy sample under the th temperature influence, represents the mass attribute of the titanium alloy sample at the th temperature, represents the mass attribute of the titanium alloy sample at the th temperature, represents the th temperature, the th temperature, represents the absolute value symbol, represents the normalization function.

8. A method for stress testing of titanium alloy materials in a high-temperature complex environment according to claim 1, characterized in that, Obtaining the mass change factor sequence, and the specific method includes: Calculating the mass change factors of the titanium alloy sample at several different temperatures within the temperature range, and forming a sequence in the order of temperature magnitude, denoted as the mass change factor sequence.

9. The stress testing method for titanium alloy materials under high-temperature complex environments according to claim 1, wherein Constructing the final quality evaluation index of the titanium alloy sample according to the change situation of the data in the mass change factor sequence of the titanium alloy sample, and the specific method includes: Among them, represents the final quality evaluation index of the titanium alloy sample, represents the value of the th data point in the mass change factor sequence; represents the mean value of the data in the mass change factor sequence, represents the number of data points in the mass change factor sequence, represents the absolute value symbol, represents the normalization function.

10. The stress testing method of a titanium alloy material under a high-temperature complex environment according to claim 9, characterized in that, Evaluating the quality of the titanium alloy sample, and the specific method includes: Predetermined threshold , judge the quality of the titanium alloy sample according to the final quality evaluation index of the titanium alloy sample. When , record the titanium alloy sample as a qualified product; when , record the titanium alloy sample as an unqualified product.

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