On the variability in fracture toughness of `ductile' bulk metallic glasses

Narayan, RL and Tandaiya, Parag and Garrett, GR and Demetriou, MD and Ramamurty, U (2015) On the variability in fracture toughness of `ductile' bulk metallic glasses. In: SCRIPTA MATERIALIA, 102 . pp. 75-78.

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Abstract

The mode I fracture toughness, K-Ic, of ductile bulk metallic glasses (BMGs) exhibits a high degree of specimen-to-specimen variability. By conducting fracture experiments in modes I and II, we demonstrate that the observed high variability in mode I, vis-a-vis mode II, is a result of highly variable propensity for the conversion of shear bands into cracks in mode I whereas in mode II, crack growth direction is fixed. Thus, the measured variability in K-Ic is intrinsic to the nature of BMGs. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Publication:	SCRIPTA MATERIALIA
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Additional Information:	Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords:	Fracture; Toughness; Bulk metallic glass; Shear bands; Variability
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	22 May 2015 07:12
Last Modified:	22 May 2015 07:12
URI:	http://eprints.iisc.ac.in/id/eprint/51549

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