K-0406 放電焼結法によるTi-Ni-Cu形状記憶合金の作製とその熱・力学特性(S08-2 力学特性)(S08 形状記憶合金の製造・加工技術と機能発現)

概要

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Ti-Ni-Cu shape memory alloy (SMA) was fabricated by the spark-plasma sintering method using elemental powders. The sintering and heat-treatment conditions were investigated to fabricate superior SMA by this method. Also, the influences of alloy compositions and heat treatment conditions on the thermo-mechanical properties were investigated. The sintered compacts were improved greatly in mechanical properties and thermo-mechanical properties by the heat treatment. The tensile properties of the as-sintered compacts could be improved fairly by performing the solution treatment, and the tensile strength and elongation of the Ti-40.8at%Ni-9.4at%Cu alloy became approximately 500MPa and 7%, respectively. The deformation resistances of the solution-treated compacts decreased with increasing Cu content, and the yield stress of Tr36.1at%Ni-14.1at%Cu alloy became about 50MPa. The Ti-40.8at%Ni-9.4at%Cu and Ti-36.1at%Ni-14.1at%Cu alloys showed a superelastic-like behavior above 333K.
社団法人日本機械学会の論文
2001-08-22