期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 33, 期 2, 页码 122-131出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2010.07.009
关键词
Very high cycle fatigue; Subsurface crack; Residual stress; Inclusion; Failure mode
资金
- Japan Society for the Promotion Science [19560080]
- Grants-in-Aid for Scientific Research [19560080] Funding Source: KAKEN
To investigate the fatigue properties of matrix high-speed tool steel (0.7C-0.1W-3Mo-2V) under very high cycle fatigue regimes, cantilever-type rotating bending fatigue tests were carried out on hour-glass shaped specimens in an air atmosphere at room temperature. The specimen surfaces were finished by grinding and cutting processes which give different surface compressive residual stresses. Both specimen treatments showed a clear duplex S-N curve, composed of three types of failure mode depending on the stress amplitude. A map of the appearance of failure modes relating stress amplitude to residual stress was proposed. The dependence of the S-N curve on a critical size of inclusion at the crack origin was demonstrated by the estimation of crack growth rate from the S-N data. (C) 2010 Elsevier Ltd. All rights reserved.
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