Fatigue properties of a metastable beta-type titanium alloy with reversible phase transformation

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	Fatigue properties of a metastable beta-type titanium alloy with reversible phase transformation
	S. J. Li; T. C. Cui; Y. L. Hao; R. Yang
	2008
发表期刊	Acta Biomaterialia
ISSN	1742-7061
卷号	4 期号:2 页码:305-317
摘要	Due to recent concern about allergic and toxic effects of Ni ions released from TiNi alloy into human body, much attention has been focused on the development of new Ni-free, metastable beta-type biomedical titanium alloys with a reversible phase transformation between the beta phase and the alpha '' martensite. This study investigates the effect of the stress-induced alpha '' martensite on the mechanical and fatigue properties of Ti-24Nb-4Zr-7.6Sn (wt.%) alloy. The results show that the as-forged alloy has a low dynamic Young's modulus of 55 GPa and a recoverable tensile strain of similar to 3%. Compared with Ti-6Al-4V ELI, the studied alloy has quite a high low-cycle fatigue strength because of the effective suppression of microplastic deformation by the reversible martensitic transformation. Due to the low critical stress required to induce the martensitic transformation, it has low fatigue endurance comparable to that of Ti-6Al-4V ELI. Cold rolling produces a beta + alpha '' two-phase microstructure that is characterized by regions of nano-size beta grains interspersed with coarse grains containing alpha '' martensite plates. Cold rolling increases fatigue endurance by similar to 50% while decreasing the Young's modulus to 49 GPa along the rolling direction but increasing it to 68 GPa along the transverse direction. Due to the effective suppression of the brittle isothermal omega phase, balanced properties of high strength, low Young's modulus and good ductility can be achieved through ageing treatment at intermediate temperature. (C) 2007 Acta Materialia, Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[li, s. j.; cui, t. c.; hao, y. l.; yang, r.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;hao, yl (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;ylhao@imr.ac.cn
关键词	Titanium Alloy Young's Modulus Fatigue Properties Reversible Martensitic Transformation Low-cycle Fatigue Biomedical Applications Martensitic-transformation Deformation-behavior Joint Replacement Youngs Modulus Ti Superelasticity Ti-29nb-13ta-4.6zr Sn
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WOS记录号	WOS:000254069200010
引用统计	被引频次：161[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/321006/32889
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. J. Li,T. C. Cui,Y. L. Hao,et al. Fatigue properties of a metastable beta-type titanium alloy with reversible phase transformation[J]. Acta Biomaterialia,2008,4(2):305-317.
APA	S. J. Li,T. C. Cui,Y. L. Hao,&R. Yang.(2008).Fatigue properties of a metastable beta-type titanium alloy with reversible phase transformation.Acta Biomaterialia,4(2),305-317.
MLA	S. J. Li,et al."Fatigue properties of a metastable beta-type titanium alloy with reversible phase transformation".Acta Biomaterialia 4.2(2008):305-317.