Cavitation-Induced Fracture Causes Nanocorrugations in Brittle Metallic Glasses

Singh, I and Narasimhan, R and Ramamurty, Upadrasta (2016) Cavitation-Induced Fracture Causes Nanocorrugations in Brittle Metallic Glasses. In: PHYSICAL REVIEW LETTERS, 117 (4).

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Abstract

Brittle metallic glasses exhibit a unique and intriguing fracture morphology of periodic nanocorrugations whose spacing and amplitude are of the order of tens of nanometers. We show through continuum simulations that they fail by spontaneous and simultaneous cavitation within multiple weak zones arising due to intrinsic atomic density fluctuations ahead of a notch tip. Dynamic crack growth would then occur along curved but narrowly confined shear bands that link the growing cavities. This mechanism involves little dissipation and also explains the formation of nanocorrugations.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW LETTERS
Publisher:	AMER PHYSICAL SOC
Additional Information:	Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	22 Aug 2016 10:36
Last Modified:	22 Aug 2016 10:36
URI:	http://eprints.iisc.ac.in/id/eprint/54457

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