Effect of accumulative roll-bonding process on phase transformation and magnetic properties of polycrystalline cobalt

Release time:2021-10-21

DOI number:10.1016/j.matchar.2020.110290

Journal:Materials Characterization

Key Words:Cobalt; Accumulative roll-bonding (ARB); Phase transformation; Coercivity

Abstract:In this paper, the cobalt was deformed by accumulative roll-bonding (ARB) process. The phase transformation behavior of cobalt during accumulative rolling and its effect on the magnetic properties of polycrystalline cobalt were investigated. Twinning occurs in α-Co phase with hexagonal closepacked (HCP) structure during the ARB process, and a large number of twin boundaries hinder the phase transformation from β-Co phase to α-Co phase. {0001} texture forms in α-Co phase during rolling deformation, however, the intensity of {0001} texture decreases with the growth of twins. The coercivity of polycrystalline cobalt gradually decreases with the increasing rolling deformation, which can be attributed to the evolutions of phase and texture.

Co-author:Z. Li, Z. Xiao*, W.T. Qiu, M. Fang, Z.Y. Chen

First Author:Y.T. Zhu

Document Type:J

Volume:163

Page Number:110290

ISSN No.:1044-5803

Translation or Not:no

Date of Publication:2020-03-26