Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy

IMR OpenIR

	Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy
	L. N. Yang; J. R. Liu; J. Tan; Z. Y. Chen; Q. J. Wang; R. Yang
	2014
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	30 期号:7 页码:706-709
摘要	An experimental study of dwell and normal cyclic fatigue behaviours was carried out using specimens from a Ti60 forging with a bimodal microstructure. Apparent decrease in the fatigue life was found under dwell fatigue condition as compared to that under normal cyclic condition. Strain produced in each cycle in dwell fatigued specimens was observed larger than that in its normal cyclic-fatigued counterparts. Interior crack initiation was found in most dwell fatigued specimens as compared to the subsurface crack initiation under normal cyclic fatigue condition. Flat and bright facets were found at crack initiation sites in both cases. The facet density is higher in dwell condition, which is consistent with the crystal orientation and Schmid factors analysis of alpha grains around secondary cracks using electron back-scattered diffraction (EBSD) methods. Dwell loading favours cleavage in alpha grains with their basal plane normals aligned no more than 15 degrees to the loading axis, which may account for its lower fatigue life according to the present study.
部门归属	[yang, lina ; liu, jianrong ; tan, jun ; chen, zhiyong ; wang, qingjiang ; yang, rui] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; wang, qj (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; lnyang@imr.ac.cn ; qjwang@imr.ac.cn
关键词	Ti60 Alloy Dwell Fatigue Quasi-cleavage Facet Electron Back-scattered Diffraction (Ebsd) Strain Accumulation Room-temperature Creep Alpha/beta-titanium-alloy Crystallographic Orientation Sensitive Fatigue Crack-propagation Ti-6242 Alloy Texture Microstructure Nucleation Initiation
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73471
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. N. Yang,J. R. Liu,J. Tan,et al. Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy[J]. Journal of Materials Science & Technology,2014,30(7):706-709.
APA	L. N. Yang,J. R. Liu,J. Tan,Z. Y. Chen,Q. J. Wang,&R. Yang.(2014).Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy.Journal of Materials Science & Technology,30(7),706-709.
MLA	L. N. Yang,et al."Dwell and Normal Cyclic Fatigue Behaviours of Ti60 Alloy".Journal of Materials Science & Technology 30.7(2014):706-709.