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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
Source PublicationJournal of Materials Science & Technology
ISSN1005-0302
Volume30Issue:7Pages:706-709
AbstractAn 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.
description.department[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
KeywordTi60 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
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73471
Collection中国科学院金属研究所
Recommended Citation
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.
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