预变形对TiNi、TiNiCu合金双程形状记忆应变的影响

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

1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China;
2. Northeastern University, Shenyang, 110004, China

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%。
- 相变温度 /
- 预变形温度 /
- 预应变 /
- 双程记忆应变
Abstract: 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 ex- isted 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℃）.
- Transformation temperature /
- Pre-strain temperature /
- Pre-strain /
- Two-way shape memory strain