Evidence for crossover martensite in Ti50Ni45Fe5: An intermediate state between normal martensite and strain glass
Evidence for crossover martensite in Ti50Ni45Fe5: An intermediate state between normal martensite and strain glass
复制标题
Ti50Ni45Fe5 中交叉马氏体的证据：正常马氏体和应变玻璃之间的中间状态
DOI：
10.1209/0295-5075/100/58001
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发表时间：
2012-12-01
期刊：
影响因子：
1.8
通讯作者：
Ren, Xiaobing
中科院分区：
文献类型：
--
作者：
Hou, Sen;Wang, Yu;Ren, Xiaobing
我们报告说，TiNi-Fe 合金系统中从正常马氏体到应变玻璃的交叉并不像以前的研究表明的那样直接进行，而是实际上是由称为交叉马氏体的中间态介导的，出现在 Ti50Ni45Fe5 的交叉成分中。从母相到交叉马氏体的马氏体转变是热力学相变，与正常马氏体转变类似。然而，其产生的交叉马氏体表现出明显的动力学特征，例如内摩擦的时间依赖性行为（时效效应），类似于应变玻璃。交叉马氏体的微观结构呈现出宏观尺寸马氏体板和纳米尺寸马氏体域共存的特殊形貌。交叉马氏体的热力学和动力学特征表明它是介于普通马氏体和应变玻璃之间的中间状态；这一发现为从普通马氏体到应变玻璃的交叉现象提供了完整的物理图像。
We report that the crossover from normal martensite to strain glass in the TiNi-Fe alloy system does not proceed directly as indicated by previous studies but is actually mediated by an intermediate state named crossover martensite, appearing in the crossover composition of Ti50Ni45Fe5. The martensitic transition from the parent phase to the crossover martensite is a thermodynamic phase transition, being similar to a normal martensitic transition. However, its produced crossover martensite shows an obvious kinetic feature such as a time-dependent behavior in internal friction (aging effect), resembling that of the strain glass. The microstructure of the crossover martensite exhibits a special morphology of coexisting macro-sized martensite plates and nano-sized martensitic domains. The displaying of both thermodynamic and kinetic features in the crossover martensite demonstrates that it is an intermediate state between normal martensite and strain glass; this finding provides a complete physical picture for the crossover phenomenon from normal martensite to strain glass.