Structural Transformations in Copper during High-Speed Deformation upon the Convergence of a Massive Cylindrical Shell under Implosion

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 (~10 4 1/s) with large values of true strain ( e varied from 0.8 to 2.0). It is shown...

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Bibliographic Details
Published in:Physics of metals and metallography 2020-05, Vol.121 (5), p.446-451
Main Authors: Zel’dovich, V. I., Frolova, N. Yu, Kheifets, A. E., Khomskaya, I. V., Shorokhov, E. V.
Format: Article
Language:English
Subjects:
Boundaries
Chemistry and Materials Science
Convergence
Copper
Copper converters
Cylindrical shells
Deformation
Diffusion
High speed
Materials Science
Metallic Materials
Orientation relationships
Phase Transformations
Structure
True strain
Twins
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Summary: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 (~10 4 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.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X20050154