- <Original Papers>Effects of Pd Addition on the Martensitic Transformation of TiNi Alloys
In order to clarify the effects of Pd substitution for Ni on the martensitic transformation in TiNi alloy, differential scanning calorimetry, X-ray diffraction and optical microscopic studies have been performed on Ti_<50>Ni_<50-X>Pd_X alloys. Ti_<50>Ni_<50-X>Pd_X alloys were divided into three groups with respect to structure of martensitic phase and Pd-concentration dependence of transformation temperature. The first group of alloys containing less than 5mol% Pd with a monoclinic martensite lowered the transformation temperature rapidly with an increase of the Pd-concentration. On the contrary, the second group containing between 5mol% and 12mol% Pd with an orthorhombic martensite raised the temperature slightly with an increase of Pd-concentration. The last group containing more than 15mol% Pd with an orthorhombic martensite raised the temperature linearly with an increase of Pd concentration according to the equation Ms'/K=96+14.51×(X_<Pd>/mol%). The alloys containing more than 15mol% Pd showed shape memory effect and were useful for high temperature shape memory material.
high temperature shape memory
- 東北大學選鑛製錬研究所彙報 = Bulletin of the Research Institute of Mineral Dressing and Metallurgy, Tohoku University
東北大學選鑛製錬研究所彙報 = Bulletin of the Research Institute of Mineral Dressing and Metallurgy, Tohoku University 43 (2), 139-148, 1988-03-25