Synergistic characterization detection system and method for surface deformation and internal defects of material

Abstract

The invention discloses a material surface deformation and internal defect collaborative characterization detection system and method.The detection method comprises the steps that a test piece with a high-temperature speckle pattern manufactured on the surface is heated to the set temperature, then fatigue loading is conducted on the test piece, and a 3D DIC system is used for collecting surface images of the test piece according to the set frequency; after the test piece is loaded to a set fatigue cycle, fatigue loading and image acquisition are paused, and CT scanning is carried out on the test piece rotating by 360 degrees by using X-ray CT equipment until the test piece is subjected to fatigue fracture; the computer performs DIC analysis on image data acquired in the fatigue loading process to obtain a surface deformation result of the test piece, and meanwhile, an internal full-field defect graph of the test piece is obtained according to CT scanning data. According to the invention, in-situ measurement and collaborative characterization detection of the 3D deformation field on the surface of the material and the shape, size and distribution of internal defects within 1000 DEG C can be realized.

Description

technical field [0001] The invention belongs to the field of experimental solid mechanics, and particularly relates to a system and method for the collaborative characterization and detection of surface deformation and internal defects of materials. Background technique [0002] Aero-engines are known as the crown jewels of modern industry, and their core hot-end components have long been used in extreme environments such as high temperature, thermal shock, fatigue overload, etc., and are mostly made of high-performance alloys that are resistant to high temperature, corrosion and oxidation. With the continuous improvement of aircraft performance requirements, the requirements for aero-engine structure and technology are becoming more and more stringent, and there is an urgent need to develop stronger, lighter and more durable components. Laser additive manufacturing technology is a new type of manufacturing technology that integrates laser, digitization, materials and other ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the above-mentioned prior art, the present invention proposes a collaborative characterization detection system and method for material surface deformation and internal defects under high-temperature fatigue environment based on commercial X-ray CT equipment and the existing single-lens 3D DIC system, which can realize 1000 In-situ measurement and collaborative characterization detection of 3D deformation field on material surface and shape, size and distribution of internal defects within ℃

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