Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7171489 | International Journal of Fatigue | 2018 | 12 Pages |
Abstract
High cycle fatigue and very high cycle fatigue properties of a surface-carburized CrNi steel were examined under axial loading with stress ratios of â1 and 0. The positive stress ratio overcomes the effect of carburized layer and promotes crack initiation from the carburized layer. The morphology of fine granular area (FGA) is more distinct under the negative stress ratio with more obvious crack closure effect. Two models concerning the inclusion-fisheye failure and the inclusion-FGA-fisheye failure are proposed. The predicted fatigue lives based on the concept of crack initiation are in good agreement with experimental results.
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Authors
Abdelhak Nehila, Wei Li, Ning Gao, Xinxin Xing, Hongqiao Zhao, Ping Wang, Tatsuo Sakai,