Competition between Invariant Habit Plane and Compatible Junction Plane in TiNb-Based Shape Memory Alloy
Competition between Invariant Habit Plane and Compatible Junction Plane in TiNb-Based Shape Memory Alloy
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TiNb基形状记忆合金中不变习惯面与兼容结面的竞争
DOI：
10.1016/j.jallcom.2012.03.003
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发表时间：
2013
影响因子：
6.2
通讯作者：
S. Miyazaki
中科院分区：
文献类型：
--
作者：
T. Inamura;H. Y. Kim;H. Hosoda;S. Miyazaki
用马氏体几何非线性理论定量地计算了惯习面（HP）处的不变面（IP）条件和结合面（JP）处的运动协调性（KC）条件，揭示了β钛形状记忆合金JP处孪晶取向关系（OR）的起源。在习惯平面变异体（HPV）中，JP处的精确双胞胎OR是不可能的。非零旋转是必要的，以保持在一个JP之间的HPV的兼容性。在这种合金中，完全相容的HPV簇（其中HP处的IP和JP处的KC同时保持）是不可能的。然而，发现双OR和KC可以同时保持。在透射电子显微镜中优先观察到的HPV簇是具有较小旋转以将KC维持在JP的簇。
The invariant plane (IP) condition at a habit plane (HP) and the kinematic compatibility (KC) condition at a junction plane (JP) are quantitatively evaluated by the geometrically nonlinear theory of martensite and the origin of the twin orientation relationship (OR) at a JP is revealed in a β titanium shape memory alloy. Exact twin OR at a JP is impossible among the habit plane variants (HPVs). A nonzero rotation is necessary to maintain the compatibility at a JP between the HPVs. The fully compatible HPV cluster in which IP at a HP and KC at a JP are maintained simultaneously is impossible in this alloy. However, it was found that twin OR and KC can be maintained simultaneously. The preferentially observed HPV clusters in transmission electron microscopy are the clusters with a smaller rotation to maintain KC at a JP.