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首页> 外文会议>International Young Researchers Conference "Youth, Science, Solutions: Ideas and Prospects" >Effect of Dislocation Density, Lattice and Impurity Friction on Expansion Dynamics of Dislocation Loop in FCC Metals
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Effect of Dislocation Density, Lattice and Impurity Friction on Expansion Dynamics of Dislocation Loop in FCC Metals

机译：位错密度，晶格和杂质摩擦对FCC金属位错环膨胀动力学的影响

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The paper presents the study on dependence of the kinetic energy per unit length of the dislocation loop, velocity and rum on the dislocation density, lattice and impurity friction in nickel, copper, aluminum, and lead. The study is carried out using the mathematical model of dislocation loop expansion dynamics based on the assumption that the dislocation loop expands in a homogeneous isotropic medium, and has the shape of a circle both during the emission by the dislocation source and during its expansion. Computational experiments are carried out by varying the material density from 4-10~(11) m~(-2) to 10~(12) m~(-2), and the value of the lattice and friction impurity from 0.1 MPa to 2 MPa, with the same value of stress acting on the dislocation source and values of material properties specific to room temperature. Nickel served as an example to exhibit the dynamics of change in dislocation velocity and kinetic energy per unit length of the dislocation at different values of material density and value of lattice and impurity friction for the first and the last dislocation. In conclusion, a comparison of dynamic characteristics of dislocation loops in copper, aluminum, and lead is carried out with similar characteristics for nickel. The obtained data were compared with experimental studies.
机译：本文介绍了对位错，速度和朗姆峰的偏离循环，速度和朗姆清晰度，镍，铝和铅的杂质摩擦的依赖性的研究。基于位于各向同性介质中的位错环扩展的假设，使用位错环扩展动力学的数学模型进行了研究，并且在位错源和膨胀期间具有圆周的形状。通过从4-10〜（11）m〜（-2）至10〜（12）m〜（-2）的材料密度和0.1MPa的晶格和摩擦杂质的值来进行计算实验。 2 MPa，具有相同的应力，作用于位错源和特定于室温的材料特性值。镍作为一个示例，以在不同的物质密度和晶格和杂质摩擦的不同价值下展开位错的脱位速度和动能的变化动力学和第一和最后一个位错的杂质。总之，铜，铝和铅位错环的动态特性进行了比较，具有镍的相似特性。将获得的数据与实验研究进行了比较。

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