Dislocation patterning: from micro- to mesoscale description
Dislocation patterning: from micro- to mesoscale description
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位错图案：从微观到介观的描述
DOI：
10.1103/physrevlett.84.1487
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发表时间：
2000
影响因子：
8.6
通讯作者：
Bakó
中科院分区：
文献类型：
--
作者：
Groma;Bakó
在晶体材料的塑性变形过程中，位错作为塑性流动的载体，往往会形成不同的形态。由于位错-位错相互作用的长程性质，这种自有序现象的起源仍然是一个悬而未决的问题。本文提出了一个由单个位错的性质直接导出的随机二维模型，使得在介观尺度上研究这一问题成为可能。双滑移位形下的数值结果表明，胞体结构的发展具有分形性。
During the plastic deformation of crystalline material the dislocations, being the carriers of the plastic flow, tend to form different patterns. Because of the long range nature of dislocation-dislocation interaction, the origin of this self-ordering phenomenon is still an open question. The paper presents a stochastic two-dimensional model derived directly from the properties of individual dislocations making it possible to investigate the problem on a mesoscale. Numerical results obtained in double slip configuration indicate the development of cell structure with fractal character.