一种具有高形状回复率的双相Ni-Mn-Ga-Gd高温形状记忆合金（英文）  

A Dual-phase Ni-Mn-Ga-Gd High-temperature Shape Memory Alloy with Large Shape Recovery Ratio

作　　者：张欣[1] 刘庆锁[1] Zhang Xin Liu Qingsuo(Tianjin University of Technology, Tianjin 300384, Chin)

机构地区：[1]天津理工大学,天津300384

出　　处：《稀有金属材料与工程》2017年第9期2375-2378,共4页Rare Metal Materials and Engineering

基　　金：China Postdoctoral Science Foundation Funded Project(2015M571269)

摘　　要：通过弯曲试验研究了双相Ni_(58)Mn_(25)Ga_(16.9)Gd_(0.1)合金的形状记忆效应和回复率。结果表明,该合金具有优异的形状回复能力。在预变形4.6%加热后,可以得到86%的形状回复率,高于已报道的双相Ni-Mn-Ga合金。这是因为Gd掺杂提高了γ相的临界滑移应力,使γ相不易发生变形。The shape memory effect and recovery ratio of dual-phase Ni_（58）Mn_（25）Ga_（16.9）Gd_（0.1） alloy were investigated by bend test. The results show that this alloy exhibits good shape recovery capability. The recovery ratio of 86% is obtained with bend pre-strain of 4.6% after heating,which is larger than that of other reported dual-phase Ni-Mn-Ga alloys. This characteristic is attributed to the critical slip stress increasing of γ phase by small amount of Gd addition,improving the ability of γ phase to resist irreversible deformation.

关 键 词：高温形状记忆 NI-MN-GA合金 合金形状回复率 

分 类 号：TG139.6[一般工业技术—材料科学与工程]