| Phase transformation behaviors and shape memory effects of TiNiFeAl shape memory alloys |
| |
| 作者姓名： | Li Xiao Fushun Liu Huibin Xu |
| |
| 作者单位： | Li Xiao，Fushun Liu，and Huibin Xu School of Materials Science and Engineering，Beihang University，Beijing 100083，China |
| |
| 摘 要： | Measurements of electrical resistivity, X-ray diffraction, and tensile test at room temperature and ?196°C were performed to investigate the effects of Al addition substituting Ni on the phase transformation behaviors, the mechanical properties, and the shape memory effects of Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 alloys. It is found that 1at% Al addition dramatically decreases the martensitic start transformation temperature and expands the transformation temperature range of R-phase for TiNiFeAl alloys. The results of tensile test indicate that 1at% Al improves the yield strength of Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 alloys by 40% and 64%, but de- creases the plasticity to 11% and 12% from 26% and 27% respectively. Moreover, excellent shape memory effect of 6.6% and 7.5% were found in Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 alloys, which results from the stress-induced martensite transformation from the R-phase.
|
| 关 键 词： | 相变 钛 镍 铁 铝 形状记忆合金 马氏体 R相 |
| 收稿时间： | 30 November 2006 |
| 修稿时间： | 2006-11-30 |
Phase transformation behaviors and shape memory effects of TiNiFeAl shape memory alloys |
| |
| Li Xiao Fushun Liu Huibin Xu.Phase transformation behaviors and shape memory effects of TiNiFeAl shape memory alloys[J].Journal of University of Science and Technology Beijing,2007,14(3):256-260. |
| |
| Authors: | Li Xiao Fushun Liu Huibin Xu |
| |
| Affiliation: | School of Materials Science and Engineering, Beihang University, Beijing 100083, China |
| |
| Abstract: | Measurements of electrical resistivity, X-ray diffraction, and tensile test at room temperature and -196℃ were performed to investigate the effects of Al addition substituting Ni on the phase transformation behaviors, the mechanical properties, and the shape memory effects of Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 alloys. It is found that 1at% Al addition dramatically decreases the martensitic start transformation temperature and expands the transformation temperature range of R-phase for TiNiFeAl alloys. The results of tensile test indicate that 1at% Al improves the yield strength of Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.5Al1 alloys by 40% and 64%, but decreases the plasticity to 11% and 12% from 26% and 27% respectively. Moreover, excellent shape memory effect of 6.6% and 7.5% were found in Ti50Ni47Fe2Al1 and Ti50Ni46.5Fe2.sAl1 alloys, which results from the stress-induced martensite transformation from the R-phase. |
| |
| Keywords: | TiNiFeAl shape memory alloy martensitic transformation behavior stress-induced martensite R phase |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ |
