Effects of Nb addition on microstructure and mechanical property of Ti-48Al-0.713 alloy

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	Effects of Nb addition on microstructure and mechanical property of Ti-48Al-0.713 alloy
	Jiang Zhiguo; Ma Yingche; Chen Bo; Zhao Xiujuan; Liu Kui; Li Yiyi
刊名	ACTA METALLURGICA SINICA
	2007-05-01
卷号	43 期号:5 页码:482-486
关键词	Ti-Al-B-Nb alloy car exhaust valve microstructure mechanical property
ISSN号	0412-1961
通讯作者	Jiang Zhiguo()
英文摘要	Ti-48Al-0.7B-xNb (x=0, 3, 5, 8; atomic fraction, %) alloys were centrifugal cast into car exhaust valves and their microstructures and mechanical properties were studied. The results indicate that all the cast alloys possessed the fully lamellar alpha(2) + gamma structure, and has no 3 phase. The grain sizes of the alloys with different Nb contents are related to the additive composition supercooling induced by boron at the solidification front area and the grain boundary pinned by the precipitated borides during the solidification process. The interlamellar spacing (A) has a linear relationship with grain size d(-1/2). The sigma(b) of the alloy is affected by oxygen and niobium contents and the 6 is directly dominated by the grain size. The Ti-48Al-0.713-5Nb alloy has the most refined grain size and the optimum combined mechanical property (sigma(b)=399.6 MPa, delta=0.26%).
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000247026200007
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/90185]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jiang Zhiguo
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jiang Zhiguo,Ma Yingche,Chen Bo,et al. Effects of Nb addition on microstructure and mechanical property of Ti-48Al-0.713 alloy[J]. ACTA METALLURGICA SINICA,2007,43(5):482-486.
APA	Jiang Zhiguo,Ma Yingche,Chen Bo,Zhao Xiujuan,Liu Kui,&Li Yiyi.(2007).Effects of Nb addition on microstructure and mechanical property of Ti-48Al-0.713 alloy.ACTA METALLURGICA SINICA,43(5),482-486.
MLA	Jiang Zhiguo,et al."Effects of Nb addition on microstructure and mechanical property of Ti-48Al-0.713 alloy".ACTA METALLURGICA SINICA 43.5(2007):482-486.