2107 TiNi系形状記憶合金中に生成するTi析出相の微視的評価(G04-2 機械材料・材料加工(2),G04 機械材料・材料加工)

概要

論文の詳細を見る
Most of shape memory alloys (SMA) are functional intermetallics with the shape memory effect and superelasticity, and are expected to be the smart materials. In future, these materials will be applied to various fields, for example science and technology, energy and medical field. In the present paper, the microstructure and chemical composition in TiNi alloy was observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. Especially, precipitation phase occurred into TiNi alloy was discussed with the focus on the microscopic properties. As the results of EDX method, the nominal TiNi alloy was mainly composed of 49.56 at% Ti and the others. But the precipitate region was occupied by about 95.45 at% Ti, and approximately become single phase. The Ni-rich phase was not confirmed around of the precipitation of Ti. The precipitates crystallized, and the crystal structure was cubic. The lattice spaces were d_<121>=1.300 A and d_<200>=1.531 A, determined by the electron beam diffraction image. Then the lattice constant was α=3.062 A.
一般社団法人日本機械学会の論文
2005-09-18