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Effect of cyclic deformation on the pseudoelasticity characteristics of Ti-Ni alloys

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Abstract

Change in the pseudoelasticity characteristics of Ti-Ni alloys during tension cycling was investigated. The critical stress for inducing martensites and the hysteresis of a stress-strain curve decreased with increasing number of cyclic loading, while the permanent elongation increased. The degree of the change in these values showed a strong dependence on the maximum applied stress during stress-induced martensitic transformation. However, no change was induced by cyclic elastic deformation even though high stress was applied. It was also found that the stabilization of the pseudoelasticity characteristics during cyclic loading was established using special thermomechanical treatments which are effective to raise the critical stress for slip. Based on these results it is concluded that the cause for the effect of cyclic deformation is the generation of dislocations in the martensitic phase.

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Authors and Affiliations

  1. Institute of Materials Science, University of Tsukuba, Sakura-mura, Niihari-gun, 305, Ibaraki, Japan

    S. Miyazaki (Assistant Professor) & K. Otsuka (Professor)

  2. Sharp Corporation, Shinjo-machi, Kita Katsuraki-gun, 639-21, Nara, Japan

    T. Imai (Student at the University of Tsukuba)

  3. Hitachi Cable Ltd., 305, Tsuchiura, Ibaraki, Japan

    Y. Igo (Student at the University of Tsukuba)

Authors
  1. S. Miyazaki
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  2. T. Imai
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  3. Y. Igo
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  4. K. Otsuka
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Miyazaki, S., Imai, T., Igo, Y. et al. Effect of cyclic deformation on the pseudoelasticity characteristics of Ti-Ni alloys. Metall Trans A 17, 115–120 (1986). https://doi.org/10.1007/BF02644447

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  • DOI: https://doi.org/10.1007/BF02644447

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