Criteria for pseudoelasticity in near-equiatomic NiTi shape memory alloys
- Univ. of Western Australia, Nedlands, Western Australia (Australia). Dept. of Mechanical and Materials Engineering
It was observed that the reverse transformation of stress-induced martensite occurred at a temperature some 20 K higher than that of thermal martensite. The increase in temperature for the reverse transformation was indicative of a stabilization effect. This stabilization effect was attributed to the change in the accommodation morphology of martensite variants from a self-accommodating state for the thermal martensite to an orientated state for the stress-induced martensite. This observation led to the reconsideration of the criteria for pseudoelasticity. Quantitative expressions of criteria on both testing temperature and austenite yield strength were derived which showed satisfactory agreement with experimental observations.
- OSTI ID:
- 589985
- Journal Information:
- Acta Materialia, Journal Name: Acta Materialia Journal Issue: 11 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
- Country of Publication:
- United States
- Language:
- English
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