journal article·2018-06

Very high cycle fatigue of surface carburized CrNi steel at variable stress ratio: Failure analysis and life prediction

Abdelhak Nehila, Wei Li, Ning Gao, Xinxin Xing, Hongqiao Zhao, Ping Wang, Tatsuo Sakai

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Abstract

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 −1 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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Research context

OpenAlex topics: Fatigue and fracture mechanics · Microstructure and Mechanical Properties of Steels · Mechanical stress and fatigue analysis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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