Effect of internal stress and bias field on the transformation strain of the Heusler alloy Ni52Mn24.4Ga23.6

نویسندگان

  • W H Wang
  • G H Wu
  • J L Chen
  • C H Yu
  • Z Wang
  • Y F Zheng
  • W S Zhan
چکیده

The effects of internal stress and bias field on transformation strain in the Heusler alloy Ni52Mn24.4Ga23.6 were investigated. It was found that both residual internal stress caused by the directional solidification during the growth and additional bias field with a direction consistent with the intrinsic preferential orientation would provide favourable conditions for exhibiting large transformation strain and magnetic-field-induced strain capability. These characteristics can be attributed to either nucleating favourable variants or increasing the volume fraction of favourable variants present through twin boundary motion.

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تاریخ انتشار 2000