In this study, electrolytic copper powders were consolidated by high-pressure torsion process (HPT) which is the most effective process to produce bulk ultrafine grained and nanocrystalline metallic materials among various severe plastic deformation processes. The bulk samples were manufactured by the HPT process at 2.5 GPa and 1/2, 1 and 10 turns. After 10 turns, full densification was achieved by high pressure with shear deformation and ultrafine grained structure (average grain size of 677 nm) was observed by electron backscatter diffraction and a scanning transmission electron microscope.

• 이동준 | Lee Dong-Jun
• 윤은유 | Yoon Eun-Yoo
• 강수영 | Kang Soo-Young
• 이정환 | Lee Jung-Hwan
• 김형섭 | Kim Hyoung-Seop)