Low-cycle fatigue properties of a titanium alloy exhibiting nonlinear elastic deformation behavior

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	Low-cycle fatigue properties of a titanium alloy exhibiting nonlinear elastic deformation behavior
	S. Q. Zhang; S. J. Li; M. T. Jia; F. Prima; L. J. Chen; Y. L. Hao; R. Yang
	2011
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	59 期号:11 页码:4690-4699
摘要	Strain-controlled low-cycle fatigue (LCF) behavior of a metastable beta-type titanium alloy Ti-24Nb-4Zr-8Sn (wt.%, termed Ti2448) was investigated at room temperature under different cycle strains. The results showed that the alloy possesses good LCF resistance because applied total cycle strains up to 4.5% are endured mainly by the recoverable elastic strain. The study also revealed a dependence of the elastic deformation behavior on the loading condition: nonlinear elasticity with large recoverable strains in uniaxial tension but almost linear elasticity with higher elastic modulus and lower recoverable strain in uniaxial compression. The above elastic asymmetry explains the facts that both fatigue life in LCF and fatigue strength in high-cycle fatigue are worse in tension compression cycles than in tension tension cycles. Microstructure analyses of these fatigue-tested specimens showed that the beta phase is elastically stable at cycle stresses up to similar to 400 MPa whereas further increasing the applied cycle stress and strain results in small amounts of the omega phase and the alpha '' martensite. These two stress-induced phase transformations are competing and exclude each other across a wide range of cycle stress. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[zhang, s. q.; li, s. j.; jia, m. t.; hao, y. l.; yang, r.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [prima, f.] enscp, grp met struct, cnrs umr 7045, lab phys chim surfaces, f-75231 paris 05, france. [zhang, s. q.; chen, l. j.] shenyang univ technol, shenyang 110023, peoples r china.;hao, yl (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;ylhao@imr.ac.cn
关键词	Elastic Deformation Low-cycle Fatigue Elastic Asymmetry Stress-induced Phase Transformation Ti-nb Alloys Biomedical Applications Plastic-deformation Alpha'' Martensite Youngs Modulus Superelasticity Zr Competition Mechanism Omega
URL	查看原文
WOS记录号	WOS:000291567900042
引用统计	被引频次：50[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/321006/30913
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. Q. Zhang,S. J. Li,M. T. Jia,et al. Low-cycle fatigue properties of a titanium alloy exhibiting nonlinear elastic deformation behavior[J]. Acta Materialia,2011,59(11):4690-4699.
APA	S. Q. Zhang.,S. J. Li.,M. T. Jia.,F. Prima.,L. J. Chen.,...&R. Yang.(2011).Low-cycle fatigue properties of a titanium alloy exhibiting nonlinear elastic deformation behavior.Acta Materialia,59(11),4690-4699.
MLA	S. Q. Zhang,et al."Low-cycle fatigue properties of a titanium alloy exhibiting nonlinear elastic deformation behavior".Acta Materialia 59.11(2011):4690-4699.