文章基本信息

标题：Research on evolution behavior of 42CrMo microscopic fatigue short crack based on microstructure effect of material
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作者：Nan Xu ; Zhiwei Fu ; Yuan Wang 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2022
卷号：14
期号：3
页码：1-7
DOI：10.1177/16878140211073206
语种：English
出版社：Sage Publications Ltd.
摘要：To investigate the causes of damage dispersion in fatigue life of alloy materials, fatigue tests on 42CrMo are carried out under microscope with the aid of a micro fatigue testing device. The fatigue crack initiation and propagation evolution process of 42CrMo are studied on the micromechanical scale. The fatigue short crack and short crack growth rates are measured respectively under loads of 1400, 1550, and 1650 N. The experimental result shows that the initiation of fatigue short cracks is related to the randomness of microstructure defects. The initiation and propagation of fatigue short cracks on the surface of samples are random and local, while the propagation is characterized by first deceleration and then acceleration.
关键词：Alloy material;symmetry;microscopic fatigue test;fatigue test;short crack