Two-stage martensitic transformation in a deformed and annealed NiTi alloy
- Univ. of Silesia, Katowice (Poland). Inst. of Physics and Chemistry of Metals
Deformation and subsequent annealing of NiTi alloys offers great possibilities of controlling characteristic temperatures, sequences of transformations and shape recovery. Todoroki and Tamura showed that depending on annealing temperatures, changes in transformation sequences in deformed alloys occur during both heating and cooling. They also observed that the cooling DSC (Differential Scanning Calorimetry) curves exhibit two peaks in the range of the martensitic transformation for specimens annealed at 500 C. Referring to the paper of Monasevich and Pascal they explained this effect as the formation of two types of martensite. In this paper the authors try to prove that the appearance of two peaks in the martensitic range on the DTA (Differential Thermal Analysis) cooling curves may be due to changes of dislocation configuration caused by the low-temperature annealing.
- OSTI ID:
- 271627
- Journal Information:
- Scripta Materialia, Vol. 35, Issue 4; Other Information: PBD: 15 Aug 1996
- Country of Publication:
- United States
- Language:
- English
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