Deformation and recrystallization of hexagonal metals: modeling and experimental results for zinc
Deformation and recrystallization of hexagonal metals: modeling and experimental results for zinc
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DOI：
10.1016/s1359-6454(01)00261-0
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发表时间：
2001-10
期刊：
影响因子：
9.4
通讯作者：
D. Solas;C. Tomé;O. Engler;H. Wenk
中科院分区：
文献类型：
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作者：
D. Solas;C. Tomé;O. Engler;H. Wenk
采用多晶方法，将晶粒划分为多个小单元，并考虑了局部相互作用，采用自洽的方法计算了六方锌的形变和织构演化。由于该模型结合了局部效应，它预测了晶内变形，并给出了变形的微观结构的元素之间的取向差和储存能量的变化方面的描述。这提供了可用作模拟再结晶过程的基础的信息。晶粒由平行六面体胞体组成，并采用蒙特卡罗算法模拟静态再结晶。成核和边界迁移率取决于细胞之间的取向差和储存能量的局部变化。该模型被应用于模拟静态再结晶动力学和相关的晶体织构的变化在锌多晶体。在平面应变压缩变形锌得到的实验结果比较好的预测和一致的机制，在高度变形域中发生的成核控制的再结晶动力学。
A polycrystal approach that divides the grains into small cells and accounts for local interactions in a self consistent way is used to calculate deformation and texture evolution of hexagonal zinc. As this model incorporates local effects, it predicts intragranular deformation and gives a description of the deformed microstructure in terms of misorientation between elements and variation in stored energy. This provides information which can be used as a basis for simulating recrystallization processes. The grains are composed of parallelepipedic cells, and a Monte Carlo algorithm is used for simulating static recrystallization. Nucleation and boundary mobility depend on the misorientation between cells and on the local variation in stored energy. The model is applied to simulate the kinetics of static recrystallization and the associated change in crystallographic texture in zinc polycrystals. Experimental results obtained by deforming zinc in plane strain compression compare well with the predictions and are consistent with a mechanism where nucleation occurring in highly deformed domains controls the recrystallization kinetic.