202 放電焼結法により作製したTi-Ni系形状記憶合金の熱・力学特性に及ぼす合金組成の影響および熱処理条件の影響(OS 粉末加工)

概要

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Ti-Ni 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 influence of alloy compositions and heat treatment conditions on the thermo-mechanical properties was investigated. The sintered compact improved greatly in mechanical properties and thermo-mechanical properties by the heat treatment. The more the Ni content, the higher the deformation resistance and the recovery stress. The solution-treated compacts were more than 400 MPa in tensile strength and more than 5.5% in elongation at any Ni content, and the solution treated Ti-51.0at%Ni compact was 320 MPa in recovery stress.The thermo-mechanical properties of shape memory training treated compacts and aged compacts are superior to those of solution treated compacts.
社団法人日本機械学会の論文
2000-11-24