Transition of Temporal Scaling Behavior in Percolation Assisted Shear-branching Structure during Plastic Deformation

Jingli Ren; Cun Chen; Gang Wang; Peter K Liaw

doi:10.1038/srep45083

Transition of Temporal Scaling Behavior in Percolation Assisted Shear-branching Structure during Plastic Deformation

Sci Rep. 2017 Mar 22:7:45083. doi: 10.1038/srep45083.

Authors

Jingli Ren¹, Cun Chen¹, Gang Wang², Peter K Liaw³

Affiliations

¹ School of Mathematics and Statistics, Zhengzhou University, 100 Science Road, Zhengzhou, 450001, China.
² Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai, 200444, China.
³ Department of Materials Science and Engineering, The University of Tennessee, Knoxville, TN, 37996, USA.

Abstract

This paper explores the temporal scaling behavior induced shear-branching structure in response to variant temperatures and strain rates during plastic deformation of Zr-based bulk metallic glass (BMG). The data analysis based on the compression tests suggests that there are two states of shear-branching structures: the fractal structure with a long-range order at an intermediate temperature of 223 K and a larger strain rate of 2.5 × 10^-2 s^-1; the disordered structure dominated at other temperature and strain rate. It can be deduced from the percolation theory that the compressive ductility, e_c, can reach the maximum value at the intermediate temperature. Furthermore, a dynamical model involving temperature is given for depicting the shear-sliding process, reflecting the plastic deformation has fractal structure at the temperature of 223 K and strain rate of 2.5 × 10^-2 s^-1.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.