Material high temperature mechanical property test system and method based on laser irradiation heating

Abstract

The invention discloses a material high temperature mechanical property test system and method based on laser irradiation heating. The provided system and method can carry out mechanical property tests under a high temperature condition, and is capable of measuring the bearing situation of a simulated material in a service condition, when a first suddenly happens. The system comprises a laser device, a material testing machine, an infrared thermal imager, a data collection instrument, a 2D/3D DIC system, and an upper computer with embedded data analysis software. The laser device is used to irradiate and heat a sample material in a long distance. At the same time, a preset load is applied on the sample material. The test process is sampled and recorded by a CCD camera. The environmental temperature and whole field temperature of the sample are measured in real time by the infrared thermal imager. The temperatures of local parts of the sample material are measured in real time by utilizing the data collection instrument. The 2D/3D DIC system is used to detect and measure the deformation and destruction on the back of the sample material and transmits the measured data to the upper computer, and the upper computer carry out mechanical property analysis of the sample material according to the received data.

Description

technical field [0001] The invention relates to a system and method for testing high-temperature mechanical properties of materials based on laser irradiation heating. Background technique [0002] Due to the difference between the preparation temperature and the service temperature of the material, the material will exhibit different thermophysical-mechanical properties at different temperatures. Especially under high temperature conditions, the thermo-mechanical properties of materials are greatly different from those in normal temperature environment. Therefore, it is of great significance to study the mechanical properties of materials under high temperature conditions. However, in conventional thermal-mechanical performance tests, electric heating wires or electric heating tubes (disks) are often used as heating sources, and air is used as cooling sources. rise. [0003] There are obvious unfavorable factors in these heating methods. Due to the obvious heat transfer ...

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Problems solved by technology

[0003] There are obvious unfavorable factors in these heating methods. Due to the obvious heat transfer in the heating process, the temperature of the electric heating tube is obviously higher than the temperature of the heated part, and there is an obvious temperature gradient, which leads to additional thermal inertia, which in turn results in the temperature alternating test. There is an obvious temperature overshoot, so this heating method has disadvantages such as slow heating rate, relatively low heating temperature, and inaccurate heating temperature.

In addition, during the test, this heating method also has limitations on the size of the sample, and it is difficult to achieve in-situ heating and other shortcomings.

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