Aging performance assessment method for eliminating residual stress of aerospace metal parts

Abstract

The invention proposes a method for evaluating the aging performance of aviation metal parts for eliminating residual stress, which comprises the following steps: preparing a test device; machining the metal parts for the test to form a plate with a preset curvature; The plate is covered with a vacuum bag film (5) and placed on the flat mold (1); the flat mold (1) with the metal parts for the test is placed in the vacuum autoclave (6); in the vacuum autoclave (6) , carry out the aging process of eliminating the residual stress to the test metal part, and utilize the vacuum bag film (5) to press the test metal part into a flat plate; use the static test platform to carry out static force or shear The assessment test is used to obtain the failure strength parameters; the failure strength parameters of the plate pressed into a plane are confirmed as the failure strength parameters of the metal parts to be assessed. The method is not only accurate and reliable, but also does not damage the mechanical properties of the metal parts to be assessed.

Description

technical field [0001] The invention relates to the technical field of aviation, in particular to a method for evaluating the aging performance for eliminating residual stress of aviation metal parts. Background technique [0002] The aerospace industry uses a large number of metal materials for the manufacture of large and complex cross-section parts. In the manufacturing process of such parts, residual stress that is difficult to eliminate will be generated, resulting in deformation of the parts. In order to eliminate the residual stress in the manufacturing process of large and complex cross-section parts, aging can be carried out in an autoclave, and pressure is introduced in the process to make the part creep, and the final part achieves the target performance and eliminates the residual stress. [0003] However, after the residual stress-relieving aging in the autoclave, the parts generally show a final shape with curvature, and the parts with curvature cannot be subje...

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Problems solved by technology

[0003] However, after aging in an autoclave to eliminate residual stress, the parts generally present a final shape state with curvature, and the parts with curvature cannot be subjected to static or shear assessment tests commonly used in engineering

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