Deformation, Fracture, and Structure of a Single-Crystal Intermetallic Compound in Multilevel Model of Plastic Deformation

IF 0.4 Q4 PHYSICS, CONDENSED MATTER

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI:10.1134/S1027451025701046

Yu. V. Solov’eva, Ya. D. Lipatnikova, G. A. Mun

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Abstract

The article presents the results of modeling the three-dimensional distribution and accumulation of deformation defects in the volume of a single-crystal intermetallic compound with the L1₂ superstructure during deformation by uniaxial compression. The calculations are performed in a multilevel model of synthesis of dislocation kinetics and mechanics of a deformable solid for cases of deformation with and without taking into account the forces of end friction. The patterns of distribution of the intensity of plastic strain and the density of dislocations in the plane of the central longitudinal section of a deformed rectangular sample are presented. In a numerical experiment, brittle fracture of a deformed sample is obtained at a degree of strain close to the value of full-scale experiment. The influence of the end friction forces on the features of shape change and fracture of a single-crystal sample is analyzed. It is shown that due to the influence of end friction forces, a noticeable decrease in the degree of brittle fracture strain occurs. A statistical assessment of the degree of homogeneity of the distribution of deformation defects in the deformed volume is carried out. A comparison of the results of the numerical experiment obtained in the work with the results of mechanical tests and studies of the deformation relief of Ni₃Ge single-crystal intermetallic compound with the L1₂ superstructure shows good agreement.

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塑性变形多层次模型中单晶金属间化合物的变形、断裂和结构

本文介绍了一种具有L12上部结构的单晶金属间化合物在单轴压缩变形过程中体积内变形缺陷的三维分布和累积的模拟结果。在考虑和不考虑端部摩擦力的变形情况下，在可变形固体的位错动力学和力学综合的多层模型中进行了计算。给出了变形矩形试样的中心纵截面平面内的塑性应变强度和位错密度的分布规律。在数值试验中，得到了变形试样在接近全尺寸试验值的应变程度下的脆性断裂。分析了端部摩擦力对单晶试样形貌变化和断裂特征的影响。结果表明，由于端部摩擦力的影响，脆性断裂应变程度明显降低。对变形体中变形缺陷分布的均匀性进行了统计评估。数值实验结果与力学试验结果以及对具有L12上部结构的Ni3Ge单晶金属间化合物的变形缓解研究结果进行了比较，结果吻合较好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques PHYSICS, CONDENSED MATTER-

CiteScore

0.90

自引率

25.00%

发文量

144

审稿时长

3-8 weeks

期刊介绍： Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques publishes original articles on the topical problems of solid-state physics, materials science, experimental techniques, condensed media, nanostructures, surfaces of thin films, and phase boundaries: geometric and energetical structures of surfaces, the methods of computer simulations; physical and chemical properties and their changes upon radiation and other treatments; the methods of studies of films and surface layers of crystals (XRD, XPS, synchrotron radiation, neutron and electron diffraction, electron microscopic, scanning tunneling microscopic, atomic force microscopic studies, and other methods that provide data on the surfaces and thin films). Articles related to the methods and technics of structure studies are the focus of the journal. The journal accepts manuscripts of regular articles and reviews in English or Russian language from authors of all countries. All manuscripts are peer-reviewed.