Analysis of Phase Transformation From Austenite to Martensite in NiTi Alloy Strips Under Uniaxial Tension

XIE Yu-xin; ZHANG Yi-tong; XU Jia-fu

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Article Navigation > Applied Mathematics and Mechanics > 2007 > 28(12): 1475-1482

XIE Yu-xin, ZHANG Yi-tong, XU Jia-fu. Analysis of Phase Transformation From Austenite to Martensite in NiTi Alloy Strips Under Uniaxial Tension[J]. Applied Mathematics and Mechanics, 2007, 28(12): 1475-1482.

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Analysis of Phase Transformation From Austenite to Martensite in NiTi Alloy Strips Under Uniaxial Tension

Department of Mechanics, Tianjin University, Tianjin 300072, P. R. China

Received Date: 2006-03-23
Rev Recd Date: 2007-09-12
Publish Date: 2007-12-15

Abstract

Abstract

Phase transformation from austenite to martensite in NiTi alloy strips under uniaxial tension has been observed in experiments and has been numerically simulated as a localized deformation. This work presented an analysis of that using the theory of phase transformation. The jump of deformation gradient across interface between the two phases and the Maxwell relation were considered. Governing equations for the phase transformation were derived. The analysis was reduced to finding the minimum value of the loading at which the governing equations have a unique, real, physically acceptable solution. The equations were solved numerically and it is verified that the unique solution exists definitely. The Maxwell stress, the stresses and strains inside both austenite and martensite phases, and the transformation-front orientation angle were determined that are in reasonably good agreement with experimental observations.
- stres-sinduced phase transformations,
- Maxwell relation,
- NiTi alloy,
- austenite,
- martensite

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References(11)

References

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