Static and dynamic behaviour of ECAPed copper alloy

Yerim Lee; Keunho Lee; Sanghyun Woo; Changsoo Lee; Leeju Park

doi:10.1051/epjconf/201818303006

Proceedings

Open Access

EPJ Web of Conferences 183, 03006 (2018)
https://doi.org/10.1051/epjconf/201818303006

Static and dynamic behaviour of ECAPed copper alloy

Yerim Lee¹, Keunho Lee¹, Sanghyun Woo², Changsoo Lee¹ and Leeju Park¹^,2^*

¹ Agency for Defense Development, 34186 Daejeon 305-600, Republic of Korea
² Weapon Systems Engineering, Korea University of Science and Technology, 34113 Daejeon, Republic of Korea

^* Corresponding author: ljpark@add.re.kr

Published online: 7 September 2018

Abstract

The equal channel angular processing (ECAP) is a severe plastic deformation technique which can produce ultrafine-grained (UFG) alloy. This paper investigate the static and dynamic behaviour of ECAPed OFHC-Cu to evaluate possibility of its application to defence industries. Tensile tests were carried out at two different strain rate (10-3/s, 1/s) using digital image correlation (DIC) technique. High strain rate experiments were conducted using the split Hopkinson pressure bar (SHPB). The results were compared with forged OFHC-Cu and additional heat treated OFHC-Cu after processed by ECAP. Flow stress and strain sensitivity of ECAPed OFHC-Copper were increased compare to forged OFHC-Copper. After ECAPed copper heat treatment, the yield strength decreased with increasing of the average grain size. And numerical simulation of ECAPed copper shaped charge was performed using Autodyn hydrodynamic code.

© The Authors, published by EDP Sciences, 2018

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.