Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy

IMR OpenIR

	Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy
	S. J. Li; Y. W. Zhang; B. B. Sun; Y. L. Hao; R. Yang
	2008
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	480 期号:1-2 页码:101-108
摘要	Thermal stability of the nanostructured grains of cold-rolled Ti-24Nb-4Zr-7.9Sn alloy and corresponding variations in mechanical properties were investigated. The activation energy for grain growth was found distinct below and above the (a + beta)/beta transus of similar to 950 K, with values of similar to 47 and similar to 206 kJ/mol, respectively. Due to the pinning effect of the a precipitates at P grain boundaries, grains sizes can be maintained at less than 100 nm during prolonged annealing at temperatures up to 773 K, and are less than 1 mu m for annealing temperature up to 923 K and time up to 2 h. Annealing above the P transus resulted in coarse grains with sizes of tens of micrometers in less than 2 h. Tensile and hardness tests showed rapid strengthening with the increase of annealing time below 773 K, which was attributed to both the rapid formation of nano-sized a precipitates and the slow growth rate of P grains. By adjusting the grain size of the cold-rolled material the high strength/low Young's modulus match desirable for implant applications can be improved over the hot-rolled bars with coarse grains. (c) 2007 Published by Elsevier B.V.
部门归属	[li, s. j.; zhang, y. w.; sun, b. b.; 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	Mechanical Properties Thermal Stability Nanostructuring Titanium Alloy Severe Plastic-deformation Shape-memory Alloys Grain-refinement Behavior Kinetics Growth Titanium Copper Ecap
URL	查看原文
WOS记录号	WOS:000255881300014
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/321006/32891
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. J. Li,Y. W. Zhang,B. B. Sun,et al. Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2008,480(1-2):101-108.
APA	S. J. Li,Y. W. Zhang,B. B. Sun,Y. L. Hao,&R. Yang.(2008).Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,480(1-2),101-108.
MLA	S. J. Li,et al."Thermal stability and mechanical properties of nanostructured Ti-24Nb-4Zr-7.9Sn alloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 480.1-2(2008):101-108.