K-2307 磁気駆動Fe-Pd形状記憶合金の機能向上のための界面制御(S13-2 多機能・複合機能化への材料協調設計(2))(S13 多機能・複合機能化への材料協調設計)

概要

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Two types of Fe-Pd polycrystals, one is composed of columnar grains oriented near [001] direction, the other equiaxed grains having random orientation, were prepared to examine the effect of texture, grain boundary character and grain size on the ferromagnetic shape memory effect. The field-induced strain of Fe-Pd alloys depended strongly on the microstructure. The magnetostriction of the columnar crystals was much higher than that of the equiaxed ones. In the columnar crystals, the strain compatibility of the transformation strain across the grain boundaries was easy to be maintained because of its [001] fiber texture, resulting in the increase in the strain. Moreover, the field-induced strain of the columnar crystals was dependent on the direction of external magnetic field, which is closely related to the martensite variants selected in the crystals. Grain size dependence of the magnetostriction in Fe-Pd alloy was also discussed.
一般社団法人日本機械学会の論文
2001-08-22