Effect of quenched-in vacancies on the martensitic transformation
- Univ. of Tsukuba, Ibaraki (Japan). Inst. of Materials Science
In most of the thermoelastic alloys to exhibit the martensitic transformation, such as Cu-Al-Ni, Cu-Zn-Al, and Ni-Al alloys etc., the {beta} phase (parent phase) exists in equilibrium only in the high temperature region, i.e. it decomposes by a slow cooling (furnace-cooling). Hence, a quenching from the {beta} phase region is a necessary operation to observe the martensitic transformation in those alloys. The quenching also freezes a high concentration of vacancies (quenched-in vacancies) or a disordered structure into the lower temperature region (e.g. room-temperature). The Au-Cd alloy with equi-atomic composition is the ideal system in which the {beta}{sub 2} parent phase (B2) exists in equilibrium even around room-temperature without a decomposition. Hence, the martensitic transformation can be observed both in the quenched and furnace-cooled specimens. The purpose of the present paper is to report the effect of the quenched-in vacancies on the martensitic transformation, which was derived from both the quenched and furnace-cooled Au-49.5at%Cd alloys.
- OSTI ID:
- 215373
- Journal Information:
- Scripta Materialia, Vol. 34, Issue 6; Other Information: PBD: 15 Mar 1996
- Country of Publication:
- United States
- Language:
- English
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