Heating-induced martensitic transformation and time-dependent shape memory behavior of Ti-Nb-O alloy
Heating-induced martensitic transformation and time-dependent shape memory behavior of Ti-Nb-O alloy
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DOI：
10.1016/j.actamat.2014.07.012
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发表时间：
2014-11
期刊：
影响因子：
9.4
通讯作者：
M. Tahara;Takafumi Kanaya;H. Y. Kim;T. Inamura;H. Hosoda;S. Miyazaki
中科院分区：
文献类型：
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作者：
M. Tahara;Takafumi Kanaya;H. Y. Kim;T. Inamura;H. Hosoda;S. Miyazaki
系统研究了（Ti-23 Nb）-1.0O合金中氧原子引入的纳米尺寸晶格调制（纳米畴）的温度依赖性和马氏体相变行为。β相中的纳米畴在更高温度下变得不稳定并且在>373 K时消失，其中在（Ti-23 Nb）-1.0O合金中证实了时间依赖的加热诱导正向转变（HIFT）。（Ti-23 Nb）-1.0O合金中HIFT的热激活过程是氧原子在纳米畴中的扩散。在（Ti-23 Nb）-1.0O合金中也证实了形状记忆行为的异常温度依赖性，并成功地用拉伸变形过程中氧原子的扩散解释了其机制。
The temperature dependence of nano-sized lattice modulation (nanodomains) introduced by oxygen atoms and martensitic transformation behavior of the (Ti–23Nb)–1.0O alloy were systematically investigated. Nanodomains in the β phase became unstable at higher temperatures and disappeared >373 K, where time-dependent heating-induced forward transformation (HIFT) was confirmed in the (Ti–23Nb)–1.0O alloy. The thermally activated process of HIFT in the (Ti–23Nb)–1.0O alloy was the diffusion of oxygen atoms in nanodomains. Anomalous temperature dependence of shape memory behavior was also confirmed in the (Ti–23Nb)–1.0O alloy, and its mechanism was successfully explained by the diffusion of oxygen atoms during tensile deformation.