时效方式对FeMnSiCrNi系合金形状记忆效应及低温松弛的影响  

The Influence of Aging Method on Shape Memory Effect and Low Temperature Relaxation of the FeMnSiCrNi Base Alloy

作　　者：杨军[1] 李宁[1] 文玉华[1] 张伟[1] 黄殊柯[1] 丁武成[2] 

机构地区：[1]四川大学,四川成都610065 [2]西南石油学院,四川成都610500

出　　处：《稀有金属材料与工程》2006年第12期2002-2004,共3页Rare Metal Materials and Engineering

基　　金：高等院校博士点学科专项科研基金(20030610093)

摘　　要：研究了时效方式对FeMnSiCrNi系合金形状记忆效应和低温松弛性能的影响。结果表明，形变后时效比未变形时效析出的碳化物更多、更细小、分布更均匀，有利于提高基体的强度，抑制不可逆的塑性变形的发生，从而显著提高合金的形状记忆效应和回复应力。合金经过10％变形后时效比未变形时效的回复量提高38％139％，回复应力提高12％-22％。不同时效方式的低温松弛率都不大，在213K时只有16％左右，尽管形变时效后回复应力的提高会提高低温松弛率，但并不显著，仅为0％～3．0％。The influences of aging method on the shape memory effect and low temperature relaxation of the FeMnSiCrNi based alloy were studied. The results show that the separated carbide on the condition of aging after deforming has the features of smaller size, more amount and homogeneous distribution compared to that on the condition of undeformed aging, it is benefit to improve the matrix strength and to suppress the occurrence of nonreversible plastic deformation, thus the shape memory effect and recovery stress of the alloy are improved remarkably. The recovery strain and the recovery stress of the alloy with 10% deformation increase by 38% -139% and 12%-22%, respectively, compared to that with no deformation. The low temperature relaxations of different aging methods are not too obvious, it is about 16% at 213 K. Nevertheless, the improvement of recovery stress after deforming aging will increase the low temperature relaxation, but not remarkably, it is only about 0%-3.0% .

关 键 词：时效 FeMnSiCrNi系合金 形状记忆效应 回复应力 低温松弛 

分 类 号：TG139.6[一般工业技术—材料科学与工程] TG156.92[金属学及工艺—合金]