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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
Corresponding AuthorJiang Zhiguo()
2007-05-01
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume43Issue:5Pages:482-486
AbstractTi-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%).
KeywordTi-Al-B-Nb alloy car exhaust valve microstructure mechanical property
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000247026200007
PublisherSCIENCE CHINA PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/90188
Collection中国科学院金属研究所
Corresponding AuthorJiang Zhiguo
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
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.
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