Shear bands mediate cavitation in brittle metallic glasses

Murali, P and Narasimhan, R and Guo, TF and Zhang, YW and Gao, HJ (2013) Shear bands mediate cavitation in brittle metallic glasses. In: SCRIPTA MATERIALIA, 68 (8). pp. 567-570.

PDF scr_mat_68_8_567_2013.pdf - Published Version Restricted to Registered users only Download (621kB) | Request a copy

Abstract

Recent experimental studies have revealed nanoscale cavities and periodic corrugations on the fracture surfaces of brittle metallic glasses. How such cavitation in these materials leads to brittle failure remains unclear. Here we show, using atomistic and continuum finite element simulations, that a shear band can mediate cavity nucleation and coalescence owing to plastic flow confinement caused by material softening. This leads to brittle fracture as cavities nucleate and coalesce within a shear band, causing the crack to extend along it. (c) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SCRIPTA MATERIALIA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copyright for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND.
Keywords:	Metallic glass; Fracture; Shear bands; Simulation
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	10 Apr 2013 10:30
Last Modified:	10 Apr 2013 10:30
URI:	http://eprints.iisc.ac.in/id/eprint/46303

Actions (login required)

View Item