Shape memory behavior of Ti-Ta and its potential as a high-temperature shape memory alloy
Shape memory behavior of Ti-Ta and its potential as a high-temperature shape memory alloy
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DOI：
10.1016/j.actamat.2008.10.041
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发表时间：
2009-02-01
期刊：
影响因子：
9.4
通讯作者：
Miyazaki, Shuichi
中科院分区：
文献类型：
--
作者：
Buenconsejo, Pio John S.;Kim, Hee Young;Miyazaki, Shuichi
本研究主要研究Ta含量对Ti-Ta合金形状记忆行为的影响。 Ti-(30-40)Ta合金具有形状记忆效应。每 1 at.% Ta，马氏体转变开始温度 (M-s) 降低 30 K。老化过程中形成的欧米伽相的量随着Ta的增加而减少。 Ti-32Ta (M-s = 440 K) 在 173 至 513 K 之间的热循环过程中证实了稳定的高温形状记忆效应。另一方面，与 Ti-32Ta 具有相似 M-s 的 Ti-22Nb 由于在热循环过程中形成大量 omega 相，其高温形状记忆效应表现出较差的稳定性。这表明 Ti-Ta 是开发新型高温形状记忆合金的一个有吸引力的候选材料。 (C) 2008 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
In this study, the effect of Ta content on shape memory behavior of Ti-Ta alloys was investigated. The shape memory effect was confirmed in Ti-(30-40)Ta alloys. The martensitic transformation start temperature (M-s) decreased by 30 K per 1 at.% Ta. The amount of omega phase formed during aging decreased with increasing Ta. A stable high-temperature shape memory effect was confirmed for Ti-32Ta (M-s = 440 K) during thermal cycling between 173 and 513 K. On the other hand, the high-temperature shape memory effect of Ti-22Nb, which has a similar M-s to Ti-32Ta, exhibited poor stability due to the large amount of omega phase formed during thermal cycling. It is suggested that Ti-Ta is an attractive candidate for the development of novel high-temperature shape memory alloys. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.