Stress-induced martensitic transformation of a NiTi alloy in isothermal shear, tension and compression
- Inst. National Polytechnique, Grenoble (France)
The thermomechanical behavior of stress-induced martensitic transformation in an equiatomic NiTi alloy was investigated with respect to different deformation modes including uniaxial tension, compression and shear of plate specimens at different temperatures above the M{sub s} temperature. Results showed that loading conditions have significant influences on the deformation behavior of the alloy. In particular, deformation behavior was observed to be asymmetric in tension and in compression. The physical origins of such an asymmetry ar explored. Comparison among the results obtained from the tension, compression and shear tests disproves the use of classical Von Mises equivalent in the modelling of the three-dimensional behavior of martensitic transformation in this alloy. Based on this analysis, another criterion for yielding, which involves the third stress invariant, is therefore suggested.
- OSTI ID:
- 665208
- Journal Information:
- Acta Materialia, Vol. 46, Issue 15; Other Information: PBD: 18 Sep 1998
- Country of Publication:
- United States
- Language:
- English
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