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首页> 外文期刊>St. Petersburg Polytechnic University Journal: Physics and Mathematics >Modeling of the plasticity of microstructured and nanostructured materials
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Modeling of the plasticity of microstructured and nanostructured materials

机译：微结构和纳米结构材料的可塑性建模

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A new approach to modeling of the plasticity of materials with nanostructure and ultrafine one has been proposed. Its main advantage is the minimum number of physical parameters in use. In the context of the proposed model, we calculated the volumetric density of the energy of surface tension of the material grains. This energy is a significant part of the internal energy during deformation. The size dependence of the melting temperature of nanoparticles was compared with experimental data. We obtained size dependence of the yield point on its basis. Yield point was interpreted as the result of changes of grains surface energy during the deformation. The obtained yield point dependence on the grain size was related to the Hall–Petch law, and this resulted in confirmation of the hypothesis on the crucial role of surface tension forces in the initial stage of plastic deformation of ultrafine materials.
机译：提出了一种建模纳米结构和超细材料可塑性的新方法。它的主要优点是使用的物理参数最少。在提出的模型的背景下，我们计算了材料晶粒的表面张力能量的体积密度。在变形期间，该能量是内部能量的重要部分。将纳米颗粒的熔融温度的尺寸依赖性与实验数据进行了比较。我们在其基础上获得了屈服点的尺寸依赖性。屈服点被解释为变形过程中晶粒表面能变化的结果。所获得的屈服点对晶粒尺寸的依赖性与Hall-Petch定律有关，这证实了关于表面张力在超细材料塑性变形初始阶段的关键作用的假说。

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