Method for testing stress of titanium alloy material in high-temperature complex environment

Abstract

The invention relates to the technical field of stress testing, in particular to a titanium alloy material stress testing method in a high-temperature complex environment, which comprises the following steps: acquiring a data sequence formed by a plurality of pieces of surface distance data of a titanium alloy sample at different temperatures, and calculating the stress of the titanium alloy material according to the change degree of the data in the data sequence; structural uniformity indexes and recovery characteristic indexes of the titanium alloy sample at different temperatures are obtained, then the quality attribute of the titanium alloy sample is determined, quality change factors of the titanium alloy sample at different temperatures are calculated, a quality change factor sequence is obtained, and the quality of the titanium alloy sample is further determined according to the change condition of data in the quality change factor sequence. And constructing a final quality evaluation index of the titanium alloy sample, and evaluating the quality of the titanium alloy sample. By constructing the final quality evaluation index of the titanium alloy sample, the more accurate quality index of the titanium alloy under the temperature interval test is obtained, and the performance and the stability of the titanium alloy material under the high-temperature condition are comprehensively evaluated.

Description

Technical Field

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

[0002] Titanium alloy is an alloy made of titanium and other metal 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 alloys can meet the use requirements in specific environments and that their corresponding physical and chemical properties can meet the corresponding standards, it is usually necessary to conduct stress tests on titanium alloy materials. Through these tests, the performance of titanium alloys in actual applications, as well as their load-bearing capacity and durability under extreme conditions, can be evaluated to ensure that titanium alloy materials meet production and application standards.

[0003] When currently testing the stress of titanium alloys at high temperatures, the analysis of the stress distribution of titanium alloys and the degree to which they are affected by temperature is not comprehensive and accurate enough, resulting in deviations in the evaluation of the test results of the titanium alloy surface stress in high temperature environments, which in turn affects the accuracy of the evaluation and classification of its production and application standards, or the production efficiency of titanium alloy materials. Summary of the invention

[0004] The invention provides a titanium alloy material stress testing method under high temperature and complex environment to solve the existing problems.

[0005] A method for testing the stress of titanium alloy materials under high temperature and complex environment of the present invention adopts the following technical scheme: An embodiment of the present invention provides a method for testing stress of titanium alloy materials under high temperature and complex environment, the method comprising the following steps: A data sequence formed by a plurality of surface distance data of the titanium alloy sample at different temperatures is obtained within a set temperature range with a set change step length, wherein the central data of the data sequence is the surface distance data of the force-bearing point of the titanium alloy sample, and the data sequence includes a reference sequence, a compressive deformation sequence, and a decompression recovery sequence; According to the similarity relationship between the surface distance data on both sides of the center data in the compression deformation sequence of the titanium alloy sample, the structural uniformity index of the titanium alloy sample at different temperatures is obtained; according to the difference between the surface distance data at the same position in the reference sequence and the pressure relief recovery sequence of the titanium alloy sample, the recovery characteristic index of the titanium alloy sample at different temperatures is obtained; then the mass attributes of the titanium alloy sample are determined, the mass change factors of the titanium alloy samples at different temperatures are calculated, and the mass change factor sequence is obtained; According to the changes in the data in the quality change factor sequence of the titanium alloy samples, the final quality evaluation index of the titanium alloy samples is constructed to evaluate the quality of the titanium alloy samples.

[0006] Furthermore, the data sequence formed by obtaining a plurality of surface distance data of the titanium alloy sample at different temperatures includes the following specific methods: At any preset temperature, a number of distance sensors are used to measure the distances from different positions of the titanium alloy sample to the material placement table when no pressure is applied, and the resulting surface distance data sequence is recorded as a reference sequence; the surface distance data sequence of the titanium alloy sample detected after pressure is applied is recorded as a compressive deformation sequence; the surface distance data sequence of the titanium alloy sample detected after the pressure is removed is recorded as a pressure-removal recovery sequence, and the obtained reference sequence, compressive deformation sequence, and pressure-removal recovery sequence are collectively referred to as a data sequence; the contact position between the pressure push rod and the titanium alloy sample is recorded as a force point, and the surface distance data of the force point is located at the center of the data sequence; data sequences of titanium alloy samples at different temperatures are obtained.

[0007] Furthermore, the structural uniformity index of the titanium alloy sample at different temperatures is obtained according to the similarity relationship between the surface distance data on both sides of the center data in the compressive deformation sequence of the titanium alloy sample, and the specific method includes: The structural uniformity factor of the titanium alloy sample is constructed by using the difference in the surface distance data on both sides of the center data in the compressive deformation sequence of the titanium alloy sample. A structural uniformity index of the titanium alloy sample is constructed 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 center data, wherein 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 center data of the titanium alloy sample is positively correlated with the structural uniformity index of the titanium alloy sample; in, Indicates The structural uniformity index of titanium alloy samples at different temperatures is Indicates The structural uniformity factor of the titanium alloy sample at the temperature is Indicates The Pearson correlation coefficient between the surface distance data on both sides of the stress point of the titanium alloy sample at different temperatures is Indicates the absolute value symbol; Represents an exponential function with a natural constant as its base.

[0008] Furthermore, the construction of the structural uniformity factor of the titanium alloy sample includes the following specific calculations: In the compressive deformation sequence of titanium alloy samples at different temperatures, the difference between the surface distance data on both sides of the center data is calculated, and the average of the absolute values ​​of the difference between the surface distance data on both sides of the center data is recorded as the structural uniformity factor of the titanium alloy sample.

[0009] Furthermore, the recovery characteristic index of the titanium alloy sample at different temperatures is obtained according to the difference in surface distance data at the same position in the reference sequence and the pressure relief recovery sequence of the titanium alloy sample, including the specific method of: in, Indicates The recovery characteristic index of titanium alloy samples at different temperatures is Indicates The reference sequence at the temperature The surface distance data detected at each position, Indicates The first Surface distance data detected at locations; Indicates the number of data points contained in the data sequence; Indicates the pressure applied to the titanium alloy sample. Represents an exponential function with a natural constant as its base.

[0010] Furthermore, the specific method of determining the quality attributes of the titanium alloy sample includes: The quality attributes of the titanium alloy sample are determined in combination with the structural uniformity index and the recovery characteristic index of the titanium alloy sample, and 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.

[0011] Furthermore, the specific method for calculating the mass change factor of the titanium alloy sample at different temperatures includes: The mass change factor of titanium alloy samples at different temperatures is calculated by using the relationship between the mass properties of titanium alloy samples and the changes in different temperatures; in, Indicates The mass change factor of titanium alloy samples under the influence of temperature is: Indicates The quality properties of titanium alloy samples at different temperatures are Indicates The quality properties of titanium alloy samples at different temperatures are Indicates Temperature, No. Temperature, represents the absolute value symbol, Represents the normalization function.

[0012] Furthermore, the method of obtaining the quality change factor sequence includes: The mass change factors of titanium alloy samples at several different temperatures within the temperature range are calculated, and a sequence is formed in the order of temperature, which is recorded as the mass change factor sequence.

[0013] Furthermore, the final quality evaluation index of the titanium alloy sample is constructed according to the change of the data in the quality change factor sequence of the titanium alloy sample, and the specific method includes: in, Represents the final quality evaluation index of titanium alloy samples, Indicates the first in the sequence of mass change factors The value of the data point; represents the mean of the data in the quality change factor sequence, represents the number of data points in the quality change factor sequence, represents the absolute value symbol, Represents the normalization function.

[0014] Furthermore, the quality of the titanium alloy sample is evaluated, including the following specific methods: Preset Threshold , the quality of the titanium alloy samples was judged according to the final quality evaluation index of the titanium alloy samples. When the titanium alloy sample is recorded as a qualified product; when , the titanium alloy sample was recorded as an unqualified product.

[0015] The beneficial effect of the technical solution of the present invention is: 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 under high temperature environment, and then determines the quality attributes of the titanium alloy samples at different temperatures, and further calculates the quality change factor of the titanium alloy samples at different temperatures. According to the stability of the data in the quality change factor sequence of the titanium alloy sample, the final quality evaluation index of the titanium alloy sample is constructed, and the quality of the titanium alloy sample is evaluated, so as to obtain the quality index of the titanium alloy under the current ambient temperature range test, and provide a more accurate reference value for whether it can meet the application environment or production and subsequent processing standards, and comprehensively evaluate the performance and stability of the titanium alloy material under high temperature conditions to ensure the safety and reliability of the material in practical applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a flow chart of the steps of a method for stress testing of titanium alloy materials under a high temperature and complex environment according to the present invention; Figure 2 It is a schematic diagram of a pressure detection device of the present invention; Figure 2 In the figure, 1 represents a number of evenly spaced distance sensors; 2 represents the entire measuring device; 3 represents the fixed slide 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; and 8 represents the sample to be tested. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the specific implementation method, structure, characteristics and effects of a stress testing method for titanium alloy materials under a high temperature and complex environment proposed by the present invention in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0019] Unless defined otherwise, 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 invention belongs.

[0020] The specific scheme of the stress testing method of titanium alloy material under high temperature and complex environment provided by the present invention is described in detail below with reference to the accompanying drawings.

[0021] See also Figure 1 , which shows a flow chart of the steps of a method for stress testing of titanium alloy materials under a high temperature and complex environment provided by an embodiment of the present invention, the method comprising the following steps: Step S001: using a pressure detection device to obtain data sequences of titanium alloy samples at different temperatures.

[0022] It should be noted that titanium alloy materials usually need to have certain physical properties in order 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, they need to be tested under different high-temperature variables, so as to analyze the test data and accurately quantify the test quality indicators of titanium alloy materials under high temperature, so as to facilitate a more accurate evaluation in the future.

[0023] Specifically, in order to implement the stress testing method of titanium alloy material under a high temperature and complex environment proposed in this embodiment, it is first necessary to collect the detection data of titanium alloy samples in different states. The specific process is as follows: like Figure 2 The figure shows a schematic diagram of a pressure detection device of the present invention, wherein serial number 1 represents a plurality of evenly spaced distance sensors, serial number 2 represents the entire measuring device, serial number 6 represents a pressure device support table, serial number 7 represents a material placement table, serial number 8 represents a sample to be tested, serial numbers 3, 4, and 5 constitute a pressure control device, wherein serial number 3 represents a fixed slide rod of a pressure push rod, serial number 4 represents a pressure control system, and serial number 5 represents a pressure push rod.

[0024] The specific measurement principle is to place the sample to be tested on the material placement table, adjust the pressure control device so that the pressure push rod is located directly above the center of the sample to be tested, apply the set pressure to the sample to be tested through the pressure push rod at several different temperatures, and use several distance sensors to detect the change in the distance from the sample to be tested to the material placement table, and obtain a series of surface distance data from the sample to be tested to the material placement table.

[0025] At any preset temperature, a number of distance sensors are used to measure the distances from different positions of the titanium alloy sample to the material placement table when no pressure is applied, and the resulting surface distance data sequence is recorded as a reference sequence; the surface distance data sequence of the titanium alloy sample detected after pressure is applied is recorded as a compressive deformation sequence; the surface distance data sequence of the titanium alloy sample detected after the pressure is removed is recorded as a pressure-removal recovery sequence, and the obtained reference sequence, compressive deformation sequence, and pressure-removal recovery sequence are collectively referred to as a data sequence; the contact position between the pressure push rod and the titanium alloy sample is recorded as the force point, and the surface distance data of the force point is located at the center of the data sequence, recorded as the center data; within the set temperature range and with a set change step size, a data sequence formed by the surface distance data of the titanium alloy sample at different temperatures is obtained.

[0026] It should be noted that a distance sensor is provided directly below the force-bearing point of the titanium alloy sample, and the distance sensor is located at the center of a number of sensors, and is used to measure the surface distance data at the force-bearing point.

[0027] It should be noted that the temperature range is preset based on experience in this embodiment. The change step is 50°C, and the given pressure is 100 Newtons. It can be adjusted according to actual conditions and is not specifically limited in this embodiment.

[0028] So far, the reference sequence, compressive deformation sequence and decompression recovery sequence of the surface distance data of titanium alloy samples at different temperatures are obtained through the above method.

[0029] Step S002: According to the similarity relationship between the surface distance data on both sides of the center data in the compressive deformation sequence of the titanium alloy sample, the structural uniformity index of the titanium alloy sample at different temperatures is obtained; according to the difference between the surface distance data at the same position in the reference sequence and the pressure-release recovery sequence of the titanium alloy sample, the recovery characteristic index of the titanium alloy sample at different temperatures is obtained; and then the mass attributes of the titanium alloy sample are determined, the mass change factors of the titanium alloy samples at different temperatures are calculated, and the mass change factor sequence is obtained.

[0030] Specifically, in step 2.1, the structural uniformity index of the titanium alloy sample at different temperatures is obtained based on the similarity relationship between the surface distance data on both sides of the center data in the compressive deformation sequence of the titanium alloy sample.

[0031] It should be noted that when the structure of the titanium alloy sample is evenly distributed, the intermolecular forces on the surface of the titanium alloy sample under the action of pressure show a certain uniformity and smoothness. Specifically, when a certain pressure is applied to the titanium alloy sample, the pressure on the materials on both sides of the force application position is similar to the force application position. Therefore, a certain pressure is applied to the titanium alloy test sample, and the deformation curve of the titanium alloy sample is collected under different temperature conditions. By calculating the deformation degree of the titanium alloy sample, the symmetry of the titanium alloy sample about the center point of the applied pressure and the smoothness of the curve change are also relatively good.

[0032] The structural uniformity factor of the titanium alloy sample is constructed by using the similarity relationship between the surface distance data on both sides of the center data in the compressive deformation sequence of the titanium alloy sample.

[0033] In the compressive deformation sequence of titanium alloy samples at different temperatures, the difference between the surface distance data on both sides of the center data is calculated, and the average of the absolute values ​​of the difference between the surface distance data on both sides of the center data is recorded as the structural uniformity factor of the titanium alloy sample.

[0034] As an example, the calculation method of the structural uniformity factor of the titanium alloy sample is: in, Indicates The structural uniformity factor of the titanium alloy sample at the temperature is Indicates The left side of the stress point in the compression deformation sequence of the titanium alloy sample at the temperature The surface distance data corresponding to the position, Indicates The right side of the stress point in the compression deformation sequence of the titanium alloy sample at the temperature The surface distance data corresponding to the position, Indicates the number of surface distance data on both sides of the force point in the compression deformation sequence. Represents the absolute value symbol.

[0035] The structural uniformity index of the titanium alloy sample is constructed 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 center 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 center data of the titanium alloy sample is directly proportional to the structural uniformity index of the titanium alloy sample.

[0036] As an example, the specific calculation method of the structural uniformity index of the titanium alloy sample is: in, Indicates The structural uniformity index of titanium alloy samples at different temperatures is Indicates The structural uniformity factor of the titanium alloy sample at the temperature is Indicates The Pearson correlation coefficient between the surface distance data on both sides of the stress point of the titanium alloy sample at different temperatures is represents the absolute value symbol, Represents an exponential function with a natural constant as its base.

[0037] It should be noted that if the absolute value of the Pielson correlation coefficient between the surface distance data on the left and right sides of the stress point of the titanium alloy sample is closer to 1, it means that the correlation between the left and right sides of the stress point of the titanium alloy sample is better, that is, the better the dispersion uniformity of the titanium alloy sample after being subjected to force on both sides of the stress point, the better the structural uniformity of the titanium alloy sample; the larger the mean of the absolute value of the difference between the data on the left and right sides of the stress point in the compressive deformation sequence obtained after applying pressure to the titanium alloy sample, the greater the difference in the dispersed pressure at the positions on both sides of the stress point, which means that the result uniformity of the titanium alloy sample is worse.

[0038] So far, the structural uniformity index of the titanium alloy sample is obtained by the above method.

[0039] Step 2.2, based on the difference in surface distance data at the same position in the reference sequence and the pressure relief recovery sequence of the titanium alloy sample, the recovery characteristic index of the titanium alloy sample at different temperatures is obtained.

[0040] It should be noted that when the titanium alloy sample is at different test temperatures, the internal molecular structure will be affected by the temperature to a certain extent, and the titanium alloy sample's response to pressure will be disturbed to a certain extent. Therefore, the pressure-relief recovery sequence of the titanium alloy sample after the pressure is removed is compared and analyzed with the reference sequence to determine the recovery characteristic index of the titanium alloy sample, which can show the stability and fatigue resistance of the titanium alloy sample under temperature.

[0041] As an example, the specific calculation method of the recovery characteristic index of the titanium alloy sample is: in, Indicates The recovery characteristic index of titanium alloy samples at different temperatures is Indicates The reference sequence at the temperature The surface distance data detected at each position, Indicates The first Surface distance data detected at locations; Indicates the number of data points contained in the data sequence; Indicates the pressure applied to the titanium alloy sample. Represents an exponential function with a natural constant as its base.

[0042] It should be noted that the difference in the surface distance data values ​​at the same position in the reference sequence and the pressure relief recovery sequence at the same temperature indicates the degree of recovery of the deformation at the position after the pressure is removed. The smaller the difference, the better the recovery. The better the deformation recovery of the titanium alloy sample at a certain temperature.

[0043] Step 2.3, combining the structural uniformity index and recovery characteristic index of the titanium alloy sample, determine the quality attributes 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.

[0044] It should be noted that when titanium alloy is subjected to different temperatures, its degree of compression deformation and degree of compression recovery will be affected by temperature. Therefore, for the current titanium alloy test sample, its quality attribute index is calculated to facilitate the subsequent determination of the degree of influence of different temperatures on the quality attributes of titanium alloy samples.

[0045] The quality attributes of the titanium alloy sample are determined in combination with the structural uniformity index and the recovery characteristic index of the titanium alloy sample, and 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.

[0046] As an example, the specific calculation method of the quality attribute of the titanium alloy sample is: in, Indicates The quality properties of titanium alloy samples at different temperatures are Indicates The structural uniformity index of titanium alloy samples at different temperatures is Indicates Recovery characteristics indicators of titanium alloy samples at different temperatures.

[0047] The mass change factor of the titanium alloy sample at different temperatures is calculated by using the changing relationship between the mass properties of the titanium alloy sample and different temperature changes.

[0048] As an example, the specific calculation method of the degree to which the quality attributes of the titanium alloy sample are affected by temperature is: in, Indicates The mass change factor of titanium alloy samples under the influence of temperature is: Indicates The quality properties of titanium alloy samples at different temperatures are Indicates The quality properties of titanium alloy samples at different temperatures are Indicates Temperature, No. Temperature, represents the absolute value symbol, Represents the normalization function.

[0049] The mass change factors of titanium alloy samples at several different temperatures within the temperature range are calculated, and a sequence is formed in the order of temperature, which is recorded as the mass change factor sequence.

[0050] So far, the mass change factor sequence of the titanium alloy sample is obtained through the above method.

[0051] Step S003: According to the change of data in the quality change factor sequence of the titanium alloy sample, a final quality evaluation index of the titanium alloy sample is constructed to evaluate the quality of the titanium alloy sample.

[0052] It should be noted that the better the stability of the data in the quality change factor sequence, the more stable the quality properties of the titanium alloy sample are under temperature changes, and the better the product quality is.

[0053] As an example, the specific calculation method of the final quality evaluation index of the titanium alloy sample is: in, Represents the final quality evaluation index of titanium alloy samples, Indicates the first in the sequence of mass change factors The value of the data point; represents the mean of the data points in the quality change factor sequence, represents the number of data points in the quality change factor sequence, represents the absolute value symbol, Represents the normalization function.

[0054] It should be noted that the smaller the mean of the data points in the quality change factor sequence, the less the quality properties of the titanium alloy sample are affected by temperature, and the better the quality; the smaller the absolute value of the difference between the numerical value of the data point in the quality change factor sequence and the mean of the sequence data, the better the material stability of the titanium alloy sample during temperature change and the better the quality.

[0055] Preset Threshold , the quality of the titanium alloy samples was judged according to the final quality evaluation index of the titanium alloy samples. When the hardware sample is recorded as a qualified product; when , the hardware products are recorded as unqualified products.

[0056] It should be noted that the threshold value of the final quality evaluation index for screening the quality of titanium alloy samples is preset in this embodiment based on experience. , which can be adjusted according to actual conditions and is not specifically limited in this embodiment.

[0057] At this point, the quality inspection of titanium alloy samples in high temperature and complex environment is achieved through the above method, and this embodiment is completed.

[0058] Compared with traditional high-temperature stress testing of titanium alloy materials, the embodiment of the present invention combines the uniformity and recovery degree of the titanium alloy sample structure under the influence of different temperatures, analyzes the surface stress test results of the titanium alloy under high temperature environment, and then determines the quality attributes of the titanium alloy samples at different temperatures, and further calculates the quality change factors of the titanium alloy samples at different temperatures. According to the stability of the data in the quality change factor sequence of the titanium alloy samples, the final quality evaluation index of the titanium alloy samples is constructed, and the quality of the titanium alloy samples is evaluated, so as to obtain the quality index of the titanium alloy under the current ambient temperature range test, and provide a more accurate reference value for whether it can meet the application environment or production and subsequent processing standards, and comprehensively evaluate the performance and stability of titanium alloy materials under high temperature conditions to ensure the safety and reliability of the materials in practical applications.

[0059] It should be noted that the The model is only used to represent negative correlation and constrain the output of the model to be in In the specific implementation, it can be replaced by other models with the same purpose. This embodiment is only based on The model is described as an example without any specific limitation. is the input to the model.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for testing the stress of titanium alloy materials under high temperature and complex environment, characterized in that: The method comprises the following steps: A data sequence formed by a plurality of surface distance data of the titanium alloy sample at different temperatures is obtained within a set temperature range with a set change step length, wherein the central data of the data sequence is the surface distance data of the force-bearing point of the titanium alloy sample, and the data sequence includes a reference sequence, a compressive deformation sequence, and a decompression recovery sequence; According to the similarity relationship between the surface distance data on both sides of the center data in the compression deformation sequence of the titanium alloy sample, the structural uniformity index of the titanium alloy sample at different temperatures is obtained; according to the difference between the surface distance data at the same position in the reference sequence and the pressure relief recovery sequence of the titanium alloy sample, the recovery characteristic index of the titanium alloy sample at different temperatures is obtained; then the mass attributes of the titanium alloy sample are determined, the mass change factors of the titanium alloy samples at different temperatures are calculated, and the mass change factor sequence is obtained; According to the changes in the data in the quality change factor sequence of the titanium alloy samples, the final quality evaluation index of the titanium alloy samples is constructed to evaluate the quality of the titanium alloy samples.

2. According to the method for testing the stress of titanium alloy materials under high temperature and complex environment as described in claim 1, it is characterized in that: The specific method of obtaining a data sequence formed by a plurality of surface distance data of the titanium alloy sample at different temperatures includes: At any preset temperature, a number of distance sensors are used to measure the distances from different positions of the titanium alloy sample to the material placement table when no pressure is applied, and the resulting surface distance data sequence is recorded as a reference sequence; the surface distance data sequence of the titanium alloy sample detected after pressure is applied is recorded as a compressive deformation sequence; the surface distance data sequence of the titanium alloy sample detected after the pressure is removed is recorded as a pressure-removal recovery sequence, and the obtained reference sequence, compressive deformation sequence, and pressure-removal recovery sequence are collectively referred to as a data sequence; the contact position between the pressure push rod and the titanium alloy sample is recorded as a force point, and the surface distance data of the force point is located at the center of the data sequence; data sequences of titanium alloy samples at different temperatures are obtained.

3. According to the method for testing the stress of titanium alloy materials under high temperature and complex environment as described in claim 1, it is characterized in that: The structural uniformity index of the titanium alloy sample at different temperatures is obtained according to the similarity relationship between the surface distance data on both sides of the center data in the compressive deformation sequence of the titanium alloy sample, and the specific method includes: The structural uniformity factor of the titanium alloy sample is constructed by using the difference in the surface distance data on both sides of the center data in the compressive deformation sequence of the titanium alloy sample. A structural uniformity index of the titanium alloy sample is constructed 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 center data, wherein 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 center data of the titanium alloy sample is positively correlated with the structural uniformity index of the titanium alloy sample; in, Indicates The structural uniformity index of titanium alloy samples at different temperatures is Indicates The structural uniformity factor of the titanium alloy sample at the temperature is Indicates The Pearson correlation coefficient between the surface distance data on both sides of the stress point of the titanium alloy sample at different temperatures is Indicates the absolute value symbol; Represents an exponential function with a natural constant as its base.

4. According to claim 3, a method for testing stress of titanium alloy materials under high temperature and complex environment, characterized in that: The structural uniformity factor of the titanium alloy sample is constructed, and the specific calculation includes: In the compressive deformation sequence of titanium alloy samples at different temperatures, the difference between the surface distance data on both sides of the center data is calculated, and the average of the absolute values ​​of the difference between the surface distance data on both sides of the center data is recorded as the structural uniformity factor of the titanium alloy sample.

5. According to claim 1, a method for testing stress of titanium alloy materials under high temperature and complex environment, characterized in that: The specific method of obtaining the recovery characteristic index of the titanium alloy sample at different temperatures based on the difference in surface distance data at the same position in the reference sequence and the pressure relief recovery sequence of the titanium alloy sample is as follows: in, Indicates The recovery characteristic index of titanium alloy samples at different temperatures is Indicates The reference sequence at the temperature The surface distance data detected at each position, Indicates The first Surface distance data detected at locations; Indicates the number of data points contained in the data sequence; Indicates the pressure applied to the titanium alloy sample. Represents an exponential function with a natural constant as its base.

6. The method for testing the stress of titanium alloy materials under high temperature and complex environment according to claim 1, characterized in that: The specific method of determining the quality attributes of the titanium alloy sample includes: The quality attributes of the titanium alloy sample are determined in combination with the structural uniformity index and the recovery characteristic index of the titanium alloy sample, and 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 testing the stress of titanium alloy materials under high temperature and complex environment according to claim 1, characterized in that: The specific method for calculating the mass change factor of the titanium alloy sample at different temperatures includes: The mass change factor of titanium alloy samples at different temperatures is calculated by using the relationship between the mass properties of titanium alloy samples and the changes in different temperatures; in, Indicates The mass change factor of the titanium alloy sample under the influence of temperature is: Indicates The quality properties of titanium alloy samples at different temperatures are Indicates The quality properties of titanium alloy samples at different temperatures are Indicates Temperature, No. Temperature, represents the absolute value symbol, Represents the normalization function.

8. The method for testing the stress of titanium alloy materials under high temperature and complex environment according to claim 1, characterized in that: The specific method of obtaining the mass change factor sequence includes: The mass change factors of titanium alloy samples at several different temperatures within the temperature range are calculated, and a sequence is formed in the order of temperature, which is recorded as the mass change factor sequence.

9. The method for testing the stress of titanium alloy materials under high temperature and complex environment according to claim 1, characterized in that: The final quality evaluation index of the titanium alloy sample is constructed according to the change of data in the quality change factor sequence of the titanium alloy sample, and the specific method includes: in, Represents the final quality evaluation index of titanium alloy samples, Indicates the first in the sequence of mass change factors The value of the data point; represents the mean of the data in the quality change factor sequence, represents the number of data points in the quality change factor sequence, represents the absolute value symbol, Represents the normalization function.

10. The method for testing the stress of titanium alloy materials under high temperature and complex environment according to claim 1, characterized in that: The specific method for evaluating the quality of the titanium alloy sample is as follows: Preset Threshold , the quality of the titanium alloy samples was judged according to the final quality evaluation index of the titanium alloy samples. When the titanium alloy sample is recorded as a qualified product; when , the titanium alloy sample was recorded as an unqualified product.

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