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- Title
Martensitic transformation behaviour of non-equilibrium heat treated Ni50·9Ti49·1 alloys.
- Authors
Zhao, X. K.; Lan, L.; Wang, W.; Chen, L.; Liu, F. J.; Huang, J. H.; Zhang, H.
- Abstract
Ni50·9Ti49·1 specimens were heat treated using a thermal simulator. The martensitic transformation behaviours of selected areas of the thermal simulating treated specimens were studied with resistivity temperature measurements. In the thermal simulating process specimens were heated by a large electric current to a given peak temperature (400, 500, 600, 800, 900 or 1100°C respectively) and immediately water cooled to room temperature. As the two ends of a NiTi alloy specimen were fixed in copper jigs, unequal heat treatment effect areas were formed in the specimen segments near its two ends. In the unequal area of an 800°C thermal simulating treated sample, a wide transformation temperature range phenomena appeared. The experimental results indicate that non-equilibrium heat treatment proves to be an effective method to fabricate transformation temperature gradient shape memory materials.
- Subjects
MARTENSITIC transformations; HEAT treatment; SHAPE memory alloys; ELECTRIC currents; TEMPERATURE
- Publication
Materials Science & Technology, 2011, Vol 27, Issue 1, p437
- ISSN
0267-0836
- Publication type
Article
- DOI
10.1179/026708309X12578491814753