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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 AuthorZhou, LZ()
2001-08-18
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume37Issue:8Pages:785-790
AbstractHigh-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.
Keywordintermetallics TiAl mechanical property creep
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000172767100001
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/113182
Collection中国科学院金属研究所
Corresponding AuthorZhou, LZ
Affiliation1.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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