Large tensile superelasticity from intermartensitic transformations in Ni49Mn28Ga23 single crystal
Large tensile superelasticity from intermartensitic transformations in Ni49Mn28Ga23 single crystal
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DOI：
10.1063/1.4942195
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发表时间：
2016-02-15
影响因子：
4
通讯作者：
Barandiaran, J. M.
中科院分区：
文献类型：
--
作者：
Chernenko, V. A.;Villa, E.;Barandiaran, J. M.
报道了（P）取向的Ni_（49）Mn_（28）Ga_（23）单晶的多阶超弹性行为，应变可达12%< 001 >。所观察到的行为是由在-140摄氏度和+60摄氏度之间的温度下的拉伸应力-应变测量期间的中间马氏体转变产生的。得到了拉伸应力-温度相图和中间马氏体相变熵的应力依赖关系。这些结果提供了重要的输入在这些合金的相变的理论建模，并显示出有前途的机械性能的经典Ni-Mn-Ga铁磁形状记忆合金。(C)2016 AIP Publishing LLC.
A multistep superelastic behavior, with up to a 12% strain, is reported in a < 001 >(P)-oriented Ni49Mn28Ga23 single crystal. The observed behavior is produced by intermartensitic transformations during the tensile stress-strain measurements at temperatures between -140 degrees C and +60 degrees C. The tensile stress-temperature phase diagram and the stress dependence of the intermartensitic transformation entropies have been obtained. These results provide important input for theoretical modeling of the phase transformations in these alloys and show promising mechanical properties of the classical Ni-Mn-Ga ferromagnetic shape memory alloys. (C) 2016 AIP Publishing LLC.