Ultra-high temperature mechanical and thermal coupling strain gauge and working method based on reflection x-ray in-situ experiment

Abstract

The invention provides an ultrahigh-temperature thermo-mechanical coupling strain gauge based on a reflection type X-ray in-situ experiment and a working method. The strain gauge comprises a base, a bidirectional screw rod which is mounted in the base and is parallel to a long edge and movable blocks which do relative motion through the bidirectional screw rod, wherein the movable blocks are connected with four connecting rods; the four connecting rods are connected two by two to form a quadrilateral structure; a pair of sliding blocks are relatively arranged at the other two nodes which are not connected with the movable blocks, and are arranged on sliding rails respectively; the sliding blocks are connected with a pair of sample clamps through piezoelectric sensors in a direction vertical to the bidirectional screw rod; the sample clamps penetrate through a shell inner wall and a shell outer wall and then penetrate through heat insulation walls to get close to a heating module; gas path connectors are mounted at the centers of long edges of the shell inner wall and the shell outer wall respectively; a cooling pipe is mounted between the shell inner wall and the shell outer wall;upper covers are mounted above the shell inner wall and the shell outer wall. According to the ultrahigh-temperature thermo-mechanical coupling strain gauge, the conversion of atmosphere environmentscan be realized and mechanical drift caused by thermal expansion is reduced; ultrahigh-temperature experiment conditions are realized and adverse effects caused by ultrahigh temperature on a moving mechanism are avoided.

Description

technical field [0001] The invention relates to an ultra-high temperature force-thermal coupling strain gauge based on reflection X-ray in-situ experiments, and in particular to an ultra-high temperature, high-precision, multi-atmosphere force-thermal coupling strain gauge applied to reflection X-ray in-situ experiments and working methods. Background technique [0002] In order to be suitable for the extreme use environment of aero-engines, single crystal nickel-based superalloys are used in the manufacture of engine blades due to their high-temperature oxidation resistance and excellent creep resistance (T.M.Pollock, et al.Nickel-based Superalloys for advanced turbine engines : chemistry, microstructure and properties, J. Propul. Power 2006). However, the manufacturing, processing and maintenance costs of engine blades are high. For the repair of engine blades, 3D printing technology is regarded as an ideal solution. If 3D printing technology is used to directly repair cr...

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in the in-situ experimental bench for reflection X-ray diffraction

Due to the lack of a test bench capable of achieving ultra-high temperature (>1100°C) force-thermal coupling, and the drift of the sample due to the thermal expansion of the test bench components at high temperatures, it is difficult to track the same observation position and obtain high-precision measurements

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