Abstract

The deformation structure in copper that forms upon the convergence of a massive cylindrical shell into a cylinder is studied in this work. The shell in the deformation zone was subjected to high-speed deformation (~10⁴ 1/s) with large values of true strain (e varied from 0.8 to 2.0). It is shown that two types of structures were formed under deformation: regions containing disperse grains with high-angle boundaries and twins and regions with deformation cells having low-angle boundaries. It is found that the twins that arose at the early stages of deformation are distorted upon further deformation: their rectilinear boundaries are bent, the orientation relationships with the matrix are violated, and high-angle boundaries of arbitrary orientation are formed.

中文翻译：

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内爆条件下大体积圆柱壳会聚时高速变形过程中铜的结构转变

摘要

在这项工作中研究了铜的变形结构，该结构是在块状圆柱壳向圆柱汇聚后形成的。变形区内的壳体经受了大变形（e从0.8到2.0变化）的高速变形（〜10 ⁴ 1 / s ）。结果表明，在变形下形成了两种类型的结构：包含具有高角度边界的分散晶粒的区域和孪晶以及具有具有低角度边界的变形单元的区域。发现在变形的早期出现的孪晶在进一步变形时会变形：它们的直线边界弯曲，违反了与基体的取向关系，并形成了任意取向的大角度边界。