Stress dependent transforming behaviors and associated functional properties of a nano-precipitates induced strain glass alloy
Stress dependent transforming behaviors and associated functional properties of a nano-precipitates induced strain glass alloy
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DOI：
10.1016/j.jallcom.2014.10.142
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发表时间：
2015-02
影响因子：
6.2
通讯作者：
Zhao Tang;Yu Wang;Xiaoqi Liao;Dong Wang;Sen Yang;Xiaoping Song
中科院分区：
文献类型：
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作者：
Zhao Tang;Yu Wang;Xiaoqi Liao;Dong Wang;Sen Yang;Xiaoping Song
应变玻璃是局部晶格应变（马氏体纳米畴）的冻结无序状态。它通常通过在常规马氏体合金中掺杂足够的点缺陷来产生。近年来，人们提出了一种新的应变玻璃制备方法，即在普通马氏体合金中引入纳米颗粒/析出相。结果表明，外加应力可以改变点缺陷诱导应变玻璃的相变行为，从而产生多种功能特性。在这项研究中，我们研究了新报道的纳米析出物诱导应变玻璃Ti 48. 7 Ni 51. 3的应力依赖的转变行为和相关的功能特性。研究发现，在外加应力的作用下，纳米析出相诱导应变玻璃发生了从应变玻璃态到马氏体态的转变，从而产生了形状记忆效应和超弹性。此外，外加应力还可以极大地改变系统的相变路径，从而产生应力变阻尼效应和弹热效应。
Strain glass is a frozen disordered state of local lattice strains (martensitic nano-domains). It is usually generated by doping sufficient point defects into conventional martensitic alloy. Recently, a new approach to generate strain glass was reported, that is to introduce many nano-sized particles/precipitates into normal martensitic alloy. It was shown that the transforming behaviors of point defects induced strain glass can be changed by external stress, which causes many functional properties. In this study, we investigated the stress dependent transforming behaviors and associated functional properties of the newly reported nano-precipitates induced strain glass Ti48.7Ni51.3. We found that the external stress induces a transition from strain glass state into martensitic state in this nano-precipitates induced strain glass, which leads to the shape memory effect and superelasticity. Moreover, the transition route of the system can also be greatly changed by external stress, resulting in the stress changed damping effect and elastocaloric effect.