低温回火对Cu-18Al-10Mn(at％)合金形状记忆性能的影响  

Effect of Low Temperature Temper on Shape Memory Effect of Cu-18Al-10Mn (at%) Alloy

作　　者：苏雷[1] 李宁[1] 焦玉琴[1,2] 何加强[1] 文玉华[1] 

机构地区：[1]四川大学,四川成都610065 [2]青岛大学,山东青岛266071

出　　处：《稀有金属材料与工程》2008年第10期1710-1713,共4页Rare Metal Materials and Engineering

基　　金：高等学校博士学科点专项科研基金(20030610093)

摘　　要：利用电阻法、光学显微观察和X射线衍射等方法研究了低温回火对Cu-18Al-10Mn(at%)合金形状记忆性能的影响。结果表明:合金在淬火态伪弹性占支配地位,随回火温度升高伪弹性逐渐减弱而形状记忆效应占支配地位。其原因是低温回火使得过饱和淬火空位浓度降低、对母相的钉扎作用减弱、有利于母相向马氏体相转变所致。The effect of low temperature temper on shape memory effect of Cu-18Al-10Mn （at%） shape memory alloy was studied by means of electrical resistance, optical microscopy and X-ray diffraction. The results show that after quenching the effect of pseudo-elasticity dominated. With increasing the tempering temperature, the effect of pseudo-elasticity gradually reduced, but shape memory effect dominated. The reason is that the tempered treatment decreased the concentration of supersaturated quenched-in vacancies, and thus weakened its pining to parent phases. Therefore after low temperature tempered treatment the transformation of parent phase to martensite phase became easy.

关 键 词：形状记忆合金 Cu—Al—Mn合金 伪弹性 空位 

分 类 号：TG146.11[一般工业技术—材料科学与工程]