A mathematical approach to transformation toughening in bulk metallic glasses

Abstract

A mathematical framework used to describe transformation toughening in zirconia-based ceramics is adapted to apply to transformation toughening in bulk metallic glass matrix composites. The method is applied to the Cu(47.5)Zr(47.5)Al(5) bulk metallic glass, showing that the low volume change of transformation in this alloy leads to negligible toughening via the proposed mechanism. An alternative mechanism for toughening is presented, whereby shear bands propagate more easily in the early stages of advance. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Metadata

Item Type:	Article
Authors/Creators:	Corteen, J. Rainforth, M. Todd, I.
Copyright, Publisher and Additional Information:	© 2011 Elsevier. This is an author produced version of a paper subsequently published in Scripta Materialia. Uploaded in accordance with the publisher's self-archiving policy.
Keywords:	Martensitic phase transformation; Bulk metallic glasses; Shape memory alloys; Ab initio calculation
Dates:	Published: 2011
Institution:	The University of Sheffield
Academic Units:	The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield)
Depositing User:	Miss Anthea Tucker
Date Deposited:	06 Sep 2011 08:53
Last Modified:	08 Feb 2013 17:33
Published Version:	http://dx.doi.org/10.1016/j.scriptamat.2011.06.018
Status:	Published
Publisher:	Elsevier
Identification Number:	10.1016/j.scriptamat.2011.06.018
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:43230