Crack initiation mechanism of extruded AZ31 magnesium alloy in the very high cycle fatigue regime

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	Crack initiation mechanism of extruded AZ31 magnesium alloy in the very high cycle fatigue regime
	F. Yang ; S. M. Yin ; S. X. Li ; Z. F. Zhang
刊名	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
	2008
卷号	491 期号:1-2 页码:131-136
关键词	magnesium alloy ultrasonic fatigue crack initiation deformation twins very high cycle fatigue cyclic deformation irreversibility zn alloy behavior deformation crystals
ISSN号	0921-5093
中文摘要	Ultrasonic fatigue testing as well as conventional fatigue testing has been conducted on commercial extruded AZ31 magnesium alloy. The S-N curve for this alloy appears to have a continuous decreasing trend in the very high cycle regime. Fatigue strength at 109 cycles is 88.7 +/- 4.1 MPa. The ratio of endurance limit at one billion cycles to the tensile strength (sigma(-1)/sigma(b)) is 0.301. Fatigue failure mainly originated from the specimen surface or near surface, where deformation twins were found after cyclic loading. Fatigue cracks were observed along twin bands. Based on cyclic deformation irreversibility caused by twinning, fatigue damage mechanisms are proposed in terms of surface/near surface crack initiation. (C) 2008 Elsevier B.V. All rights reserved.
原文出处	://WOS:000258236800016
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/33268]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	F. Yang,S. M. Yin,S. X. Li,et al. Crack initiation mechanism of extruded AZ31 magnesium alloy in the very high cycle fatigue regime[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,491(1-2):131-136.
APA	F. Yang,S. M. Yin,S. X. Li,&Z. F. Zhang.(2008).Crack initiation mechanism of extruded AZ31 magnesium alloy in the very high cycle fatigue regime.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,491(1-2),131-136.
MLA	F. Yang,et al."Crack initiation mechanism of extruded AZ31 magnesium alloy in the very high cycle fatigue regime".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 491.1-2(2008):131-136.