| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1625448 | Journal of Alloys and Compounds | 2008 | 6 Pages |
Abstract
Aging effect on a Ti47.25Ni48.75V4 shape memory alloy is investigated. Experimental results reveal that the 400 °C aged Ti47.25Ni48.75V4 alloy exhibits a B2 â R â B19â² two-stage martensitic transformation on cooling, but exhibits a B19â²Â â B2 one-stage transformation on heating. Two kinds of second phases, (Ti,V)2Ni and V9(Ti,Ni), are observed in the solution-treated Ti47.25Ni48.75V4 alloy. (Ti,V)2Ni exhibits an FCC order structure with a lattice parameter of 11.1 Ã
while V9(Ti,Ni) exhibits a BCC structure with a lattice parameter of 3.01Â Ã
. There appear lots of fine spherical V9(Ti,Ni) and coherent Ti3Ni4 precipitates after 400 °C aging for the Ti47.25Ni48.75V4 alloy. These precipitates will strengthen the alloy's matrix and improve the shape recovery ability.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
H.C. Lin, C.H. Yang, M.C. Lin, C.S. Lin, K.M. Lin, L.S. Chang,