| Numéro |
J. Phys. IV France
Volume 112, October 2003
|
|
|---|---|---|
| Page(s) | 893 - 896 | |
| DOI | https://doi.org/10.1051/jp4:20031025 | |
J. Phys. IV France 112 (2003) 893
DOI: 10.1051/jp4:20031025
Phase transformation behavior in Ti-Ni alloy ribbons fabricated by melt spinning
T.-H. Nam1, J.-H. Kim1, M.-S. Choi1, H.-W. Lee1 and Y.-W. Kim21 Division of Materials Engineering and ERI, Gyeongsang National University, 900 Gazwa-dong, Chinju, Gyeongnam 660-701, Korea
2 Department of Materials Engineering, Keimyung University
Abstract
Phase transformation behavior of Ti-50Ni and Ti-49Ni (at%) alloy ribbons fabricated by melt spinning, have been investigated.
The two-stage B2-R-B19' transformation appeared in as-spun alloy ribbons, while the one-stage B2-B 19'transformation appeared
in alloy ribbons heat treated at 873 K. At the linear velocity higher than 36 m/s, the B2-R-B19' transformation was observed
in as-spun Ti-49Ni alloy ribbons. In as-spun Ti-SONi alloy ribbons, the B2-RB19' transformation appeared even at the linear
velocities of 21 m/s. From TEM observations, it was found that very fine spherical Ti
2Ni particles with the size less than 20 nm were formed in Ti-49Ni alloy ribbons, The Ti
2Ni particles had an orientation relationship to the B2 phase and had coherency strains around them, which was thought to play
an important role to induce the R phase transformation.
© EDP Sciences 2003