预变形对TiNi、TiNiCu合金双程形状记忆应变的影响  

Effect of Pre-strain on Two-way Shape Strain in TiNi and TiNiCu Alloy

作　　者：金伟[1] 王剑[1] 颜莹[2] 

机构地区：[1]中国科学院金属研究所,沈阳110016 [2]东北大学,沈阳110004

出　　处：《核动力工程》2005年第4期410-413,418,共5页Nuclear Power Engineering

摘　　要：采用电阻-温度测试仪、申克疲劳试验机等实验装置,研究了预变形对Ti49.2Ni50.8和Ti50Ni43Cu7合金双程记忆应变的影响.结果表明:Ti49.2Ni50.8合金在-60℃下、8%～16%预变形单程记忆应变均在6%以上;在-60℃、14%预应变下双程记忆应变最大,为3.6%.Ti50Ni43Cu7合金在20℃下,8～14%预变形,单程记忆应变在5%以上;20℃、12%预应变下双程记忆应变最大,为3.0%.Ti49.2Ni50.8合金环在13.7%预应变下训练4次时,双程记忆应变达到4.1%.Effect of pre-strain on two-way shape memory strain of Ti49.2Ni50.8 and Ti50Ni43Cu7 alloy were investigated by tensile test and electrical resistance measurement. The results indicated that there existed optimal pre-strain temperature and pre-strain value, at which the specimen exhibited maximum two-way shape memory strain. For Ti49.2Ni50.8 tensile specimens, the maximum two-way shape memory strain was 3.6% （pre-strain 14% at -60℃）, for Ti50Ni43Cu7 tensile specimens the maximum two-way shape memory strainwas 3.0% （pre-strain 12% at 20℃）. For Ti49.2Ni50.8 ring shape specimens, the maximum two-way shape memory strain was 4.1% （pre-strain 13.7% at -60℃）.

关 键 词：相变温度 预变形温度 预应变 双程记忆应变 

分 类 号：TL34[核科学技术—核技术及应用]