Cold and hot in-situ tensile microscopic stress test system

Abstract

The invention relates to a cold and hot in-situ stretching microscopic stress test system, which comprises an in-situ stretching table, wherein the in-situ stretching table is provided with a stretching cavity; a temperature control system which is connected to the stretching cavity and is used for stabilizing the temperature in the stretching cavity; a humidity control system which is connected to the stretching cavity and used for stabilizing the humidity in the stretching cavity; and a DIC microscopic strain measurement system, wherein an image taking lens of the DIC microscopic strain measurement system is arranged right opposite to the transparent window of the stretching cavity, and the DIC microscopic strain measurement system is used for microscopic observation and measurement of three-dimensional coordinates, displacement and strain of the surface of the sample in the stretching cavity in the deformation process of the sample in combination with a digital image correlation method and a binocular stereomicroscope technology. According to the test system, the temperature and the humidity in the stretching cavity can be stable and can be flexibly adjusted according to test requirements, the DIC microscopic strain measurement system performs real-time imaging and full-field strain analysis on the test process, the test sample test in the environment with stable temperature and humidity can be realized, and the test precision of the test sample in the stretching cavity is improved.

Description

technical field [0001] The present application relates to the technical field of material in-situ tensile testing devices, in particular to a cold and hot in-situ tensile micro-stress testing system. Background technique [0002] Under different temperature conditions, the material's loading conditions and its microstructure properties determine its service life. It is of great significance to observe the deformation, damage and failure mechanism of the microstructure under the load of the material to test the mechanical properties of the material. The in-situ tensile test can realize the observation of the microstructure and the test of the mechanical properties of the material under load. Combining the microstructure changes during the material testing process with the obtained mechanical property curves for analysis is helpful for the in-depth study of the microscopic mechanism of the material. [0003] In the testing process of materials, the influence of temperature cha...

AI Technical Summary

Problems solved by technology

However, the existing in-situ stretching instruments often do not have the function of temperature regulation. Even if some existing in-situ stretching devices can provide the function of temperature regulation, the temperature control range and temperature control accuracy are often difficult to meet the requirements. Therefore, it is urgent to develop A cold and hot in-situ tensile microstress testing system, which provides stable testing environment conditions for samples during the tensile test to improve the accuracy of the experiment

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