Analysis method of material failure crack source

Abstract

The application provides an analysis method for a material failure crack source, which belongs to the field of material detection. The analysis method for the source of material failure cracks includes: obtaining the failure sample and at least one intermediate sample from the same batch of parts or the same part; the failure sample is taken from the fractured part of the part, and the intermediate sample is taken from the unbroken part of the part. An intermediate sample with an intermediate crack is selected as the cracked sample; the intermediate crack is a crack whose position corresponds to the fracture position of the failed sample. According to the location of the middle crack in the cracked sample, the location of the failure crack source of the part is determined. This analysis method can effectively reduce the interference of the part's use environment and processing process on finding the crack source.

Description

technical field [0001] The present application relates to the field of material testing, and in particular, to an analysis method for material failure crack sources. Background technique [0002] The failure of materials, especially the failure of metal mechanical parts during the use of metal materials, has a great impact on personal safety and property safety. In order to prevent repeated failures and effectively improve product quality, it is necessary to find out the cause of material failure, and conduct a systematic analysis of the material failure mechanism, then prevent and control the cause of material failure, and then carry out technological development and improvement, and finally improve product quality . Therefore, material failure analysis has strong practical significance for improving product quality and arbitrating failure accidents. [0003] Material failure analysis begins with finding the source of the failure crack. The existing techniques for findin...

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Problems solved by technology

[0005] In one case, if the crack source of the part is generated during the processing, and after multiple subsequent processing or processing, the crack source fracture of the part will be oxidized many times. At this time, the crack source cannot be determined by the fracture or structure of the crack source. link

[0006] In another case, if the working conditions of the part are relatively complicated, after the crack source is generated in the part, the fracture near the crack source will be worn under stress, severely oxidized, rusted or polluted by oil, and the expansion line and shell pattern of the crack source cannot be observed. line, the location of the crack source cannot be determined

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