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Metals 2017, 7(4), 134; doi:10.3390/met7040134

High-Cycle Microscopic Severe Corrosion Fatigue Behavior and Life Prediction of 25CrMo Steel Used in Railway Axles

1
Department of Engineering Mechanics, Applied Mechanics Laboratory, Tsinghua University, Beijing 100084, China
2
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
*
Author to whom correspondence should be addressed.
Received: 18 January 2017 / Revised: 28 March 2017 / Accepted: 7 April 2017 / Published: 11 April 2017
(This article belongs to the Special Issue Fatigue Damage)
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Abstract

The effects of environmental media on the corrosion fatigue fracture behavior of 25CrMo steel were investigated. The media include air, and 3.5 wt % and 5.0 wt % NaCl solutions. Experimental results indicate that the media induces the initiation of corrosion fatigue cracks at multiple sites. The multi-cracking sites cause changes in the crack growth directions, the crack growth rate during the coupling action of the media, and the stress amplitude. The coupling effects are important for engineering applications and research. The probability and predictions of the corrosion fatigue characteristic life can be estimated using the three-parameter Weibull distribution function. View Full-Text
Keywords: corrosion fatigue; characteristic life prediction; 25CrMo steel; microscopic analysis; Weibull distribution corrosion fatigue; characteristic life prediction; 25CrMo steel; microscopic analysis; Weibull distribution
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Wang, Y.-L.; Wang, X.-S.; Wu, S.-C.; Yang, H.-H.; Zhang, Z.-H. High-Cycle Microscopic Severe Corrosion Fatigue Behavior and Life Prediction of 25CrMo Steel Used in Railway Axles. Metals 2017, 7, 134.

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