Effect of current density and zinc content during electrical-assisted forming of copper alloys

Authors

C. M. Dzialo, Smith College
M. S. Siopis, University of New HampshireFollow
Brad L. Kinsey, University of New HampshireFollow
K. J. Wienmann, University of California - Berkeley

Abstract

Electrical-assisted forming (EAF), where current is directly applied to the workpiece during deformation, has been shown to dramatically reduce the flow stress of the material. In this paper, the effect of altering the Zn content in Cu specimens during EAF is investigated. Varying results were observed depending on if the threshold density, which produces significant reductions in flow stress, was surpassed. Thus, temperature increases due to resistive heating alone are not the cause of the observed effects. Once the threshold current is exceeded, the flow stress reductions increased with increasing Zn content. These results support theories regarding the physical mechanism of EAF as dislocations are able to move past alloying elements more effectively. (C) 2010 CIRP.

Department

Mechanical Engineering

Publication Date

1-1-2010

Journal Title

CIRP Annals-Manufacturing Technology

Publisher

Elsevier

Digital Object Identifier (DOI)

10.1016/j.cirp.2010.03.014

Document Type

Article

Recommended Citation

Christine M. Dzialo, Michael S. Siopis, Klaus J. Weinmann, and Brad L. Kinsey (2010) “Effect of Current Density and Zinc Content during Electrical-Assisted Forming of Copper Alloys”, Annals of CIRP, Vol. 59, No. 1, pp. 299-302.

Rights

Copyright © 2010, Elsevier