Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys

IMR OpenIR

	Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys
	S. J. Li; R. Yang; M. Niinomi; Y. L. Hao; Y. Y. Cui; Z. X. Gu
	2005
发表期刊	Materials Science and Technology
ISSN	0267-0836
卷号	21 期号:6 页码:678-686
摘要	Phase transformations and mechanical properties of both Ti-29Nb-13Ta-4 center dot 6Zr and Ti-39Nb-13Ta-4 center dot 6Zr (wt-%) alloys were investigated. The microstructure of the 29Nb alloy is sensitive to solution and aging treatment. Ice water quenching from the solution treatment temperature resulted in (beta+alpha '') microstructure but air or furnace cooling led to a mixture of (beta+omega). The formation of the orthorhombic alpha '' martensite thus suppresses omega formation in the ice water quenched 29Nb alloy. Cooling rate from the solution treatment temperature also has a significant effect on the formation of alpha and omega phases during subsequent isothermal aging below the omega start temperature: slow cooling enhances omega but depresses alpha formation. This cooling rate dependence of aged microstructure was attributed to alpha '' martensite acting as precursor of the alpha phase, thus providing a low energy path to the precipitation of alpha at the expense of omega. Phase transformation in the 39Nb alloy is more sluggish than that in the 29Nb alloy, owing to the presence of the higher content of beta stabiliser Nb. For the 29Nb alloy, Young's modulus and mechanical properties are sensitive to the fraction of phases, and change significantly during aging, in contrast with the 39Nb alloy.
部门归属	chinese acad sci, inst met res, titanium alloy lab, shenyang 110016, peoples r china. toyohashi univ technol, dept prod syst engn, toyohashi, aichi 4418580, japan. univ london, queen mary, dept mat, london e1 4ns, england.;yang, r (reprint author), chinese acad sci, inst met res, titanium alloy lab, 72 wenhua rd, shenyang 110016, peoples r china;ryang@imr.ac.cn
关键词	Metastable Beta Titanium Alloy Phase Transformation Young's Modulus Mechanical Properties Youngs Modulus Omega-phase Biomedical Applications Titanium-alloys Cast-iron Ti-29nb-13ta-4.6zr Competition Martensite Ti-6al-4v Beta
URL	查看原文
WOS记录号	WOS:000230594300008
引用统计	被引频次：22[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/321006/34904
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. J. Li,R. Yang,M. Niinomi,et al. Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys[J]. Materials Science and Technology,2005,21(6):678-686.
APA	S. J. Li,R. Yang,M. Niinomi,Y. L. Hao,Y. Y. Cui,&Z. X. Gu.(2005).Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys.Materials Science and Technology,21(6),678-686.
MLA	S. J. Li,et al."Phase transformation during aging and resulting mechanical properties of two Ti-Nb-Ta-Zr alloys".Materials Science and Technology 21.6(2005):678-686.