| 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 Author | Deng Wen(wdeng@gxu.edu.cn) |
| 2006-12-01 | |
| Source Publication | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
 |
| ISSN | 1003-6326 |
| Volume | 16Issue:6Pages:1259-1262 |
| Abstract | The 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. |
| Keyword | NiTi alloy microdefect electron density martensite transformation |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000243345900003 |
| Publisher | ALLERTON PRESS INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/88821 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Deng Wen |
| Affiliation | 1.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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