磁性形状记忆材料Ni-Mn-Ga研究现状

Development of Ni-Mn-Ga Magnetic Shape Memory Material

Ni -Mn -Ga是一种新发展起来的磁性形状记忆材料 ,除具有较大的可逆恢复应变量和恢复力外 ,又具有很高的响应频率 ,是一种极具工程应用前景的新型功能材料。本文系统概述了Ni-Mn -Ga合金的晶体结构、马氏体相变、应力应变行为及其形状记忆效应机制的研究现状 ,并指出了需深入研究的问题。

As a newly developed magnetic shape memory material,Ni-Mn-Ga alloys show not only the large recovery strain and stress but also the rapidly responding frequency,and are thought to be the most prospective function materials in the engineering. This present study systematically summarizes the previous works on the crystal structure, martensite transformation, strain-stress behavior and the shape memory effect of Ni-Mn-Ga alloys and proposes the topics needed to further investigation.