Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9804151 | Journal of Alloys and Compounds | 2005 | 7 Pages |
Abstract
Transformation sequence and second phases in Ti50âXNi50WX, Ti50Ni50âXWX and Ti51Ni49âXWX alloys with X = 1-2Â at.% are investigated. Two different second-phase particles located at grain boundaries are observed. The lattice parameters of Ti50Ni49W1 martensite are calculated from the selected area diffraction patterns (SADP) and all of them are larger than those of Ti50Ni50 alloy. Experimental results indicate that the W atoms replace Ni atoms, instead of Ti ones in these alloys. In addition, Ti50âXNi50WX and Ti51Ni49âXWX alloys have a two-stage B2 â R â B19â² transformation, but the Ti50Ni50âXWX alloy has a one-stage B2 â B19â² transformation because the former Ms temperatures are depressed significantly. The shape recovery of these alloys can be improved by the W solid-solution hardening. With higher matrix hardness in these alloys, there is better shape recovery.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
S.F. Hsieh, S.K. Wu, H.C. Lin, C.H. Yang,