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Kinetic Model of Thermoelastic Martensite Transformation in Niti and NiMn Based Shape Memory Alloys

  • K. H. Wu (a1), J.D. Shi (a1), F. Yang (a1) and Z. J. Pu (a1)

Abstract

A new, quantitative model was developed to describe the martensite transformation kinetics of thermoelastic shape memory alloys (SMAs). In addition, a series of experiments were conducted to study the Kinetics of thermoelastic martensite transformation in four SMA systems: NiTi, NiTi-15at%Hf, NiTi-20at%Zr and NiMn-7.5at%Ti alloys. Comparisons between data of the kinetic of martensite transformation with the present theoretic models show that the proposed model is in good agreement and concurs with the experimental data. Also, a comparison of data from the proposed model with data from existing kinetic models, such as Liang's and Magee's [1,7], indicates that the proposed model can better describe the experimental data, including the relationship between dξ(T)/dT and ξ, and dξ(T)/dT and T.

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3 Wada, B. K., Fanson, J. L., and Crawley, E. F., J. of Intelligent Mat. Sys. and Structures, 1, 157 (1990).
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7 Magee, C. L., “Phase Transformation”,( American Society for Metals, 1970), p.115.
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Kinetic Model of Thermoelastic Martensite Transformation in Niti and NiMn Based Shape Memory Alloys

  • K. H. Wu (a1), J.D. Shi (a1), F. Yang (a1) and Z. J. Pu (a1)

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