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
Corresponding Author	Zhou, LZ()
	2001-08-18
Source Publication	ACTA METALLURGICA SINICA
ISSN	0412-1961
Volume	37 Issue:8 Pages:785-790
Abstract	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.
Keyword	intermetallics TiAl mechanical property creep
Indexed By	SCI
Language	英语
WOS Research Area	Metallurgy & Metallurgical Engineering
WOS Subject	Metallurgy & Metallurgical Engineering
WOS ID	WOS:000172767100001
Publisher	SCIENCE CHINA PRESS
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/113182
Collection	中国科学院金属研究所
Corresponding Author	Zhou, LZ
Affiliation	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.CNR, TEMPE, I-20125 Milan, Italy
Recommended Citation 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.

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