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Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation
Hu Yi-feng; Deng Wen; Hao Wen-bo; Yue Li; Huang Le; Huang Yu-yang; Xiong Liang-yue
Corresponding AuthorDeng Wen(wdeng@gxu.edu.cn)
2006-12-01
Source PublicationTRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
ISSN1003-6326
Volume16Issue:6Pages:1259-1262
AbstractThe microdefects and free electron densities in B2, R and B19' phases of Ni50.78Ti49.22 alloy were studied by positron lifetime measurements. Comparing the lifetime parameters of the Ni50.78Ti49.22 alloy measured at 295 K and 225 K, it is found that the free electron density of the R phase is lower than that of the B2 phase; the open volume of the defects of the R phase is larger, while the concentration of these defects is lower than that of the B2 phase. The Ni50.78Ti49.22 alloy exhibits B19' phase at 115 K. In comparison with the R phase, the free electron density of the B19' phase increases, the open volume of the defects of the B19' phase reduces, and the concentration of these defects increases. The microdefects and the free electron density play an important role during the multi-step transformations (B2 -> R -> B19' phase transformations) in Ni50.78Ti49.22 alloy with the decrease of temperature.
KeywordNiTi alloy microdefect electron density martensite transformation
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000243345900003
PublisherALLERTON PRESS INC
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/88821
Collection中国科学院金属研究所
Corresponding AuthorDeng Wen
Affiliation1.Guangxi Univ, Coll Phys Sci & Technol, Nanning 530004, Peoples R China
2.Jiangsu Teachers Univ Technol, Dept Basic Sci, Changzhou 213001, Peoples R China
3.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Hu Yi-feng,Deng Wen,Hao Wen-bo,et al. Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2006,16(6):1259-1262.
APA Hu Yi-feng.,Deng Wen.,Hao Wen-bo.,Yue Li.,Huang Le.,...&Xiong Liang-yue.(2006).Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,16(6),1259-1262.
MLA Hu Yi-feng,et al."Microdefects and electron densities in NiTi shape memory alloys studied by positron annihilation".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 16.6(2006):1259-1262.
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