Monochromatic X-ray Single Crystal/Oriented Crystal Stress Measurement System and Measurement Method

Abstract

The invention discloses a single crystal / directional crystal stress measurement system and a single crystal / directional crystal stress measurement method for monochromatic X rays. The single crystal / directional crystal stress measurement system comprises a multi-axis sample table, a sample table control module, a homocentric height adjusting module, a control module and a calculation module, wherein the multi-axis sample table comprises an X degree of freedom for translation along an X axis, a Y degree of freedom for translation along a Y axis, a Z degree of freedom for translation along a Z axis, a rotational degree of freedom for rotation around the Z axis and a tilting degree of freedom for tilting around the X axis and / or the Y axis; the sample table control module controls movements of a sample table in the degrees of freedom thereof based on instructions; the concentric height adjusting module transmits an instruction to the sample table control module based on a position of a sample surface, so that the sample surface is in a concentric height position; the control unit transmits an instruction to the sample table control module to enable the sample surface in the concentrichigh position to rotate and tilt, and adjusts an X-ray incident direction of an X-ray generator and an acquisition position of an acquisition module to acquire diffraction peak signals; and the calculation module generates stress data based on the diffraction peak signals.

Description

technical field [0001] The invention belongs to the technical field of single crystal measurement, in particular to a monochromatic X-ray single crystal / oriented crystal stress measurement system and measurement method. Background technique [0002] As a key part in gas turbines and aircraft engines, single crystal blades have superior mechanical properties, high temperature creep resistance and oxidation resistance. During the processing and production of single crystal blades, some residual stress will inevitably be generated, and the existence of residual stress will affect the service life of the blade. In addition, during the service process, due to the long-term use under extreme working conditions, or the impact from foreign objects, such as dust particles, residual stress will also be generated on the blade, which will initiate cracks and cause failure and failure. At present, as a treatment process for blades, laser shock strengthening introduces residual stress on...

AI Technical Summary

Problems solved by technology

Relying on large scientific devices can achieve high-precision and even high-spatial-resolution measurements. However, the available machine time of large scientific devices is limited, which cannot meet the purpose of production and measurement at any time. The amount of data collected by large scientific devices is very large, and often has Multi-layered meaning, data analysis is difficult, and it is not practical in actual engineering use

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