An in-situ tension and compression experimental device for x-ray stress test calibration

Abstract

The invention relates to an in-situ tension and compression test device for X-ray stress test calibration. The in-situ tension and compression test device includes a sample clamping mechanism, a load test mechanism, a displacement transmission mechanism and a slide rail and bottom plate mechanism; the left fixture of the clamping mechanism is fixed on a bottom plate; the right fixture of the clamping mechanism is installed on one sliding block of the slide rail and bottom plate mechanism; the slide rail and bottom plate mechanism is fixed between the left fixture of the bottom plate and a supporting frame; the supporting frame of the displacement transmission mechanism is installed on the bottom plate; a displacement transmission component is installed on the other sliding block of a sliding block guide rail; the left end of a displacement loading threaded rod is installed in the circular groove of the displacement transmission component; the right end of the displacement loading threaded rod is supported on the supporting frame; the load test mechanism is a load sensor; and the center symmetric line of the load sensor is coaxial with the center symmetric line of the displacement loading threaded rod and the center symmetric line of a test sample. The load transfer coaxiality of the in-situ tension and compression test device is good; and an obtained stress value of the sample is accurate, and the sample is in a unidirectional stress state. The in-situ tension and compression test device of the invention has the advantages of simple structure, convenient manufacture, small size, convenient manual control, high numerical value reliability and high load measurement range.

Description

technical field [0001] The invention belongs to the technical field of in-situ tension-compression test devices, in particular to an in-situ tension-compression test device for X-ray stress test calibration. Background technique [0002] X-ray diffraction (XRD) has many advantages such as non-destructive, fast, and accurate. It can selectively, quantitatively, and locally measure the residual stress of materials. It is not only suitable for deformed samples, but also can directly measure mechanical parts. Therefore, this method has been widely used in the detection of the mechanical state (residual stress) of crystalline materials. However, in the test of the residual stress of some specific materials, such as titanium alloy, austenitic stainless steel, aluminum alloy, etc., the diffraction peaks of polycrystalline surfaces often appear, and some diffraction peaks are superimposed on each other. According to the traditional method, for the diffraction peak of any crystal pl...

AI Technical Summary

Problems solved by technology

In the prior art, the X-ray diffraction residual stress test accuracy evaluation device is a single compression device or a single tension device, and its disadvantages are: it can only realize a single function, and the load range is small, and the structure is relatively complicated

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