High-temperature mechanical behavior and deformation mechanism of Ti-47Al-2W-0.5Si creep-resistant alloy

IMR OpenIR

	High-temperature mechanical behavior and deformation mechanism of Ti-47Al-2W-0.5Si creep-resistant alloy
	Zhou, LZ ; Guo, JT ; Lupinc, V ; Maldini, M
通讯作者	Zhou, LZ()
	2001-08-18
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	37 期号:8 页码:785-790
摘要	High-temperature mechanical behavior and deformation mechanism of Ti-47Al-2W-0.5Si cast alloy have been investigated. The results show that, the TiAl base intermetallic exhibits improved mechanical properties over the conventional IN713LC superalloy on density-corrected yield strength from RT to high temperature, and density-corrected creep strength at 650 degreesC. Its minimum creep rate increases with increasing of applied stress and creep temperature, and can be expressed by the creep formula <()over dot>(m)=A((sigma)/(E))(10)exp(-(420)/(RT)). Decrease of the initial creep rate is attributed to piling up and tangling of dislocations emanated from the alpha (2)/gamma interfaces. Deformation twinning is suggested to be a result of a stress-relief process due to the inhibition of dislocations during deformation. It was found that deformation twins and shear bands can form in the primary creep stage. Evolution of microstructures, including coarsening and phase transformation of alpha (2) laths, was also observed. Besides, industrial application and development of the alloy are involved.
关键词	intermetallics TiAl mechanical property creep
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:000172767100001
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：2[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/321006/113182
专题	中国科学院金属研究所
通讯作者	Zhou, LZ
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.CNR, TEMPE, I-20125 Milan, Italy
推荐引用方式 GB/T 7714	Zhou, LZ,Guo, JT,Lupinc, V,et al. High-temperature mechanical behavior and deformation mechanism of Ti-47Al-2W-0.5Si creep-resistant alloy[J]. ACTA METALLURGICA SINICA,2001,37(8):785-790.
APA	Zhou, LZ,Guo, JT,Lupinc, V,&Maldini, M.(2001).High-temperature mechanical behavior and deformation mechanism of Ti-47Al-2W-0.5Si creep-resistant alloy.ACTA METALLURGICA SINICA,37(8),785-790.
MLA	Zhou, LZ,et al."High-temperature mechanical behavior and deformation mechanism of Ti-47Al-2W-0.5Si creep-resistant alloy".ACTA METALLURGICA SINICA 37.8(2001):785-790.