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
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	491 期号:1-2 页码:131-136
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.
部门归属	[yang, f.; yin, s. m.; li, s. x.; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;yang, f (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;fanyang@imr.ac.cn
关键词	Magnesium Alloy Ultrasonic Fatigue Crack Initiation Deformation Twins Very High Cycle Fatigue Cyclic Deformation Irreversibility Zn Alloy Behavior Deformation Crystals
URL	查看原文
WOS记录号	WOS:000258236800016
引用统计	被引频次：200[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33268
专题	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.