12 July 1999 Influence of aging treatment on Ni46Ti44Ta10 shape memory alloy
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Abstract
The effect of aging treatments on the microstructure, martensite transformation temperature and shape memory effects (SME) of the Ni46Ti44Ta10 alloy was carefully studied in this work. The result show that the microstructure of Ni46Ti44Ta10 alloy contains an NiTi phase, a eutectic structure, which formed by NiTi, and (beta) -Ta phase, and some dispersed NiTa2 compound. The aging treatment can produce Ti11Ni14 precipitates in the alloy. Meanwhile, precipitation hardening was noticed during the aging process. The phase transformation temperatures and hardness of the sample alloy vary with the changing of the composition and redistribution of each phase during the aging treatments. After the aging treatment, the samples demonstrated an enhanced shape memory effect compared with untreated samples. It is also evident that there is a strong correspondence between the enhanced shape memory effect and the increase of the hardness value.
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Jianlu Ma, Jianlu Ma, J. I. Subirana, J. I. Subirana, Zhongjie J. Pu, Zhongjie J. Pu, Kuang-Hsi Wu, Kuang-Hsi Wu, "Influence of aging treatment on Ni46Ti44Ta10 shape memory alloy", Proc. SPIE 3675, Smart Structures and Materials 1999: Smart Materials Technologies, (12 July 1999); doi: 10.1117/12.352805; https://doi.org/10.1117/12.352805
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