Dislocation Dissociation Strongly Influences on Frank—Read Source Nucleation and Microplasticy of Materials with Low Stacking Fault Energy
Dislocation Dissociation Strongly Influences on Frank—Read Source Nucleation and Microplasticy of Materials with Low Stacking Fault Energy
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DOI：
10.1088/0256-307x/31/4/046102
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发表时间：
2014-03
影响因子：
3.5
通讯作者：
Minsheng Huang;Yaxin Zhu;Zhenhua Li
中科院分区：
文献类型：
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作者：
Minsheng Huang;Yaxin Zhu;Zhenhua Li
使用三维离散位错动力学模拟 (3D-DDD) 研究了位错解离对 Frank-Read (F-R) 源演化的影响。经典的 Orowan 成核应力和最近提出的 F-R 源的 Benzerga 成核时间模型得到了改进。这项工作表明，有必要将位错解离方案引入3D-DDD模拟中，特别是对于具有低堆垛层错能的小尺寸材料的微塑性模拟。
The influence of dislocation dissociation on the evolution of Frank—Read (F-R) sources is studied using a three-dimensional discrete dislocation dynamics simulation (3D-DDD). The classical Orowan nucleation stress and recently proposed Benzerga nucleation time models for F-R sources are improved. This work shows that it is necessary to introduce the dislocation dissociation scheme into 3D-DDD simulation, especially for simulations on micro-plasticity of small sized materials with low stacking fault energy.