金属的辐照蠕变：多尺度模型

IF 0.5 4区材料科学 Q4 CRYSTALLOGRAPHY

Crystallography Reports Pub Date : 2025-09-10 DOI:10.1134/S1063774525600498

A. B. Sivak, V. M. Chernov

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引用次数: 0

摘要

在多尺度模型的框架下，研究了低应力（低于屈服强度）下立方晶格金属的辐照蠕变。该模型结合了理论方法（晶体塑性的位错理论、扩散理论、弹性的各向异性理论、化学动力学）和计算方法（分子静力学、分子动力学、物体动力学蒙特卡罗方法）。在含有直线位错的bcc （Fe， V）和fcc （Cu）晶格的金属中，测量了辐射蠕变速率和模量，其Burgers向量分别为1/2 < 111 >、< 100 > (bcc)和1/2 < 110 > (fcc)，均匀分布在可能的滑移系族中。所得的辐照蠕变速率和模量的计算值和理论值与反应堆实验结果吻合较好。

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Irradiation Creep in Metals: Multiscale Modelling

The irradiation creep in metals with cubic crystal lattices at low stresses (below the yield strength) was studied within the framework of multiscale modelling. The modelling combines theoretical (dislocation theory of crystal plasticity, diffusion theory, anisotropic theory of elasticity, chemical kinetics) and computational (molecular statics, molecular dynamics, object kinetic Monte Carlo method) approaches. The values of the rate and modulus of irradiation creep were determined in metals with bcc (Fe, V) and fcc (Cu) crystal lattices containing rectilinear dislocations with the Burgers vectors 1/2〈111〉, 〈100〉 (bcc), and 1/2〈110〉 (fcc), uniformly distributed over possible families of their slip systems. The obtained calculated and theoretical values of the irradiation creep rate and modulus are in good agreement with the results of reactor experiments.

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来源期刊

Crystallography Reports 化学-晶体学

CiteScore

1.10

自引率

28.60%

发文量

审稿时长

4-8 weeks

期刊介绍： Crystallography Reports is a journal that publishes original articles short communications, and reviews on various aspects of crystallography: diffraction and scattering of X-rays, electrons, and neutrons, determination of crystal structure of inorganic and organic substances, including proteins and other biological substances; UV-VIS and IR spectroscopy; growth, imperfect structure and physical properties of crystals; thin films, liquid crystals, nanomaterials, partially disordered systems, and the methods of studies.