Effect of microstructure on ultra-high cycle fatigue behavior of Ti-6Al-4V

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	Effect of microstructure on ultra-high cycle fatigue behavior of Ti-6Al-4V
	J. H. Zuo; Z. G. Wang; E. H. Han
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	473 期号:1-2 页码:147-152
摘要	The fatigue behavior of Ti-6Al-4V alloy with the bimodal and basketweave microstructures has been investigated. The results show that the S-N curves of Ti-6Al-4V with both microstructures continuously decrease with increasing the number of cycles to failure and have no horizontal asymptote in the regime of 10(5) to 10(9) cycles. SEM observation of fracture surface indicates that the crack initiation sites abruptly shift from surface to interior of the specimen with decreasing the stress amplitude. It is found that the surface crack initiation mainly results from the machining traces. Nevertheless, most of the internal fatigue cracks initiate in the border region of primary alpha-grains in bimodal microstructure or at alpha-beta interfaces in basketweave microstructure, which induced by inhomogeneity of microstructures and incompatibility of deformation between two phases. The size of the internal crack initiation site was evaluated and the dependence of the fatigue life on the location and size of the initiation sites is discussed. (C) 2007 Elsevier B.V. All rights reserved.
部门归属	[zuo, j. h.; han, e. h.] chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china. [wang, z. g.] chinese acad sci, shenyang natl lab mat sci, shenyang 110016, peoples r china.;zuo, jh (reprint author), chinese acad sci, inst met res, environm corros ctr, shenyang 110016, peoples r china;jhzuo@imr.ac.cn
关键词	Ti-6al-4v Alloy Ultra-high Cycle Fatigue Microstructure Crack Initiation Life Regime Structural-materials Crack Growth Mechanisms Failure Alloys Steels Propagation Frequencies Features
URL	查看原文
WOS记录号	WOS:000252902500020
引用统计	被引频次：176[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/321006/33422
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. H. Zuo,Z. G. Wang,E. H. Han. Effect of microstructure on ultra-high cycle fatigue behavior of Ti-6Al-4V[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,473(1-2):147-152.
APA	J. H. Zuo,Z. G. Wang,&E. H. Han.(2008).Effect of microstructure on ultra-high cycle fatigue behavior of Ti-6Al-4V.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,473(1-2),147-152.
MLA	J. H. Zuo,et al."Effect of microstructure on ultra-high cycle fatigue behavior of Ti-6Al-4V".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 473.1-2(2008):147-152.