Effects of boron addition on the microstructure and mechanical property of As-cast Ti-46.5Al-8Nb alloy

IMR OpenIR

	Effects of boron addition on the microstructure and mechanical property of As-cast Ti-46.5Al-8Nb alloy
	Jiang Zhiguo; Chen Bo; Ma Yingche; Zhao Xiujuan; Liu Kui; Li Yiyi
通讯作者	Liu Kui(kliu@imr.ac.cn)
	2007-05-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	43 期号:5 页码:487-492
摘要	Boron addition (<= 0.7%, atomic fraction) in fully lamellar Ti-46.5Al-8Nb alloys could refine the grain size and the critical content is about 0.5%. The refining mechanism is controlled both by additive composition supercooling induced by boron at the solidification front and the precipitated boride pinning grain boundaries. Interlamellar spacing (lambda) increases with more boron added because boron could reduce the undercooling of the lamellar formation, and lambda value has linear relationship with the grain size d(-1/2). The higher the alpha(2) volume fraction in the as-cast alloy, the higher the hardness. The ultimate strength (sigma(b)) and elongation (delta) are improved when boron content increases. sigma(b) and grain size follows the Hall-Petch relationship.
关键词	Ti-Al alloy boron microstructure mechanical property
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000247026200008
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：4[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/321006/89488
专题	中国科学院金属研究所
通讯作者	Liu Kui
作者单位	Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Jiang Zhiguo,Chen Bo,Ma Yingche,et al. Effects of boron addition on the microstructure and mechanical property of As-cast Ti-46.5Al-8Nb alloy[J]. ACTA METALLURGICA SINICA,2007,43(5):487-492.
APA	Jiang Zhiguo,Chen Bo,Ma Yingche,Zhao Xiujuan,Liu Kui,&Li Yiyi.(2007).Effects of boron addition on the microstructure and mechanical property of As-cast Ti-46.5Al-8Nb alloy.ACTA METALLURGICA SINICA,43(5),487-492.
MLA	Jiang Zhiguo,et al."Effects of boron addition on the microstructure and mechanical property of As-cast Ti-46.5Al-8Nb alloy".ACTA METALLURGICA SINICA 43.5(2007):487-492.