B2 precipitates and distribution of W in a Ti-47Al-2W-0.5Si alloy

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	B2 precipitates and distribution of W in a Ti-47Al-2W-0.5Si alloy
	R. Yu; L. L. He; Z. Y. Cheng; J. Zhu; H. Q. Ye
	2002
发表期刊	Intermetallics
ISSN	0966-9795
卷号	10 期号:7 页码:661-665
摘要	The precipitation behavior of B2 particles and the distribution of W in a Ti-47Al-2W-0.5Si alloy were investigated using high-spatial resolution analytical electron microscopy (AEM) and high-resolution electron microscopy (HREM). The ledges at the alpha(2)/gamma interfaces were found to be enriched in W and therefore the preferable nucleation sites for the B2 precipitates. In the B2 phase, as high as one third of Al is substituted by W in comparison with the composition of the 7 phase. The segregation of W to the alpha(2)/gamma and B2/gamma interfaces was also detected. These results provide explanations for the previous observations that additions of tungsten are effective in promoting the creep resistance of TiAl alloys. (C) 2002 Published by Elsevier Science Ltd.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. tsing hua univ, inst mat sci & engn, electron microscopy lab, beijing 100084, peoples r china.;yu, r (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;ryu@imr.ac.cn
关键词	Titanium Aluminides Electron Microscopy Based On Tial Precipitates Transmission Phase Interfaces Site Occupany Analytical Electron-microscope Gamma-titanium Aluminides Orientation Relationship Creep Deformation Tial Alloy Atomic-scale Segregation Microstructure Interfaces Resistance
URL	查看原文
WOS记录号	WOS:000177393000004
引用统计	被引频次：33[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/321006/36510
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	R. Yu,L. L. He,Z. Y. Cheng,et al. B2 precipitates and distribution of W in a Ti-47Al-2W-0.5Si alloy[J]. Intermetallics,2002,10(7):661-665.
APA	R. Yu,L. L. He,Z. Y. Cheng,J. Zhu,&H. Q. Ye.(2002).B2 precipitates and distribution of W in a Ti-47Al-2W-0.5Si alloy.Intermetallics,10(7),661-665.
MLA	R. Yu,et al."B2 precipitates and distribution of W in a Ti-47Al-2W-0.5Si alloy".Intermetallics 10.7(2002):661-665.