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首页> 外文会议>Internation Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures >Investigation of the Grain Size Influence on Hardening in Polycrystals Using the Two-Level Model Based on Crystal Plasticity
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Investigation of the Grain Size Influence on Hardening in Polycrystals Using the Two-Level Model Based on Crystal Plasticity

机译：基于晶体塑性的双层模型研究多晶体晶粒尺寸对硬化的影响

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A two-level mathematical model of inelastic deformation of fcc polycrystals is considered and realized. It is accepted in the model that movements of dislocations on slip systems make the main contribution to inelastic deformation in each polycrystalline grain. The hardening law is considered. It is based on physical mechanisms of dislocation interactions with grains boundaries and on accumulation dislocations of orientation discrepancy in them. Numerical experiments on deformation of polycrystals describing its inelastic behavior in case of various macrolevel deformation schemes are carried out. These results reflect the high quality of the yield stress dependence on grain size hardening. The results suggest a significant contribution to grain boundary hardening in the overall frame of deformation and have satisfactory agreement with the experimental data.
机译：考虑并实现了FCC多晶体的非弹性变形的两层数学模型。它在模型中被接受的是，滑移系统的脱位运动在每个多晶晶中对无弹性变形作出主要贡献。考虑了硬化定律。它基于与谷物界限的脱位相互作用的物理机制以及它们中取向差异的积累脱位。进行了在各种MacRoLevel变形方案的情况下描述其无弹性行为的多晶的变形的数值实验。这些结果反映了对晶粒尺寸硬化的屈服应力依赖性的高质量。结果表明对整体变形框架中的晶界硬化的显着贡献，并且与实验数据具有令人满意的协议。

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