Martensitic transformation from incommensurate state with nano-scale domain structure in a Ti–42Ni–8Fe (at.%) alloy under a compressive stress

Abstract

This article reports a martensitic transformation from an incommensurate state with a nano-scale domain-like structure in a Ti–42Ni–8Fe alloy. The martensitic transformation is suppressed at a temperature above 4.2 K under zero stress, but occurs under a compressive stress. The product phase is most likely to be the R-phase, but there is a large temperature hysteresis of about 87 K.

Keywords:

• stress-induced martensitic transformation
• shape memory alloy
• R-phase

Acknowledgements

This study was supported by The Global COE Program (Center of Excellence for Advanced Structural and Functional Materials Design) from MEXT, Japan.