Mechanical Properties of Ti-50(Pt,Ir) High-Temperature Shape Memory Alloys
Mechanical Properties of Ti-50(Pt,Ir) High-Temperature Shape Memory Alloys
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DOI：
10.2320/matertrans.47.650
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发表时间：
2006-03
影响因子：
1.2
通讯作者：
Y. Yamabe-Mitarai;T. Hara;S. Miura;H. Hosoda
中科院分区：
文献类型：
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作者：
Y. Yamabe-Mitarai;T. Hara;S. Miura;H. Hosoda
为了开发高温形状记忆合金，人们注意到了Ti-50(Pt，Ir)摩尔%化合物，因为它们在1273K以上从B2转变为B19(2H)或4H(40)结构。对Ti-50(Pt，Ir)进行了热膨胀测量和加卸载压缩试验，以确定是否存在形状记忆效应或超弹性。热膨胀测试表明，部分化合物出现了形状恢复现象。在加卸载压缩试验后，在上述马氏体相变温度下重新加热，形状回复率最大可达4%左右。在三元化合物中也观察到了超弹性。讨论了Ti-50(Pt，Ir)作为高温形状记忆合金的潜力。
To develop high-temperature shape memory alloys, Ti-50(Pt,Ir)mol% compounds are noted because of their martensitic transformation from B2 to B19(2H) or 4H(40) structures above 1273 K. A thermal expansion measurement and loading-unloading compression test were performed for Ti-50(Pt,Ir) to determine if the shape memory effect or superelasticity was shown. The thermal expansion measurement indicated the shape recovery in some of the compounds. The maximum shape recovery was about 4% by reheating at the above martensite transformation temperature after a loading-unloading compression test. Superelasticity was also observed in ternary compounds. The potential of Ti-50(Pt,Ir) as a high-temperature shape memory alloy is discussed.