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Updated: Jun 3, 2026
Determining the Mechanical Strength of Ultra-Fine-Grained Metals
Published on: November 22, 2021
Thickness reduction effect in obtaining ultrafine-grained microstructure from oxygen-free copper using high-ratio
1Department of Materials Science and Engineering, Hongik University, 72-1 Mapo-gu, Sangsu-dong, Seoul 121-791, Korea.
Abstract:
This study has demonstrated a novel method of fabricating ultrafine-grained oxygen free copper sheets by applying high-ratio differential speed rolling (HRDSR) at room temperature that induces severe plastic deformation. Temperature rise of the sample due to friction and plastic deformation during deformation by HRDSR was significant such that beyond a thickness reduction > 65%, the grain refining efficiency was reduced. The proposed processing method holds great potential for continuous production of ultrafine-grained copper alloy sheets.
