Deformation morphology underneath the Vickers indent in a Zr-based bulk metallic glass

Jana, S and Bhowmick, R and Kawamura, Y and Chattopadhyay, K and Ramamurty, U (2004) Deformation morphology underneath the Vickers indent in a Zr-based bulk metallic glass. In: Intermetallics, 12 (10-11). pp. 1097-1102.

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Abstract

Hardness and plastic deformation during Vickers indentation in as-cast, annealed, and fully crystallized $Zr_5_7Cu_2_7Al_1_1Ni_5$ bulk metallic glass was examined. Subsurface deformation morphology under the indenter tip was studied at various loads and for different annealing time. Appreciable plastic deformation, through shear banding, occurs in the as-cast and annealed alloys. Two different types of shear bands are observed. Their occurrence depends upon the amount of annealing and hence on the extent of crystallization. The fully crystallized alloy exhibits extensive cracking. Trends in the deformation zone size with load are consistent with the expanding cavity model, while the shear band morphology, particularly for the as-cast sample, attests the qualitative applicability of the slip line field theory.

Item Type:	Journal Article
Publication:	Intermetallics
Publisher:	Elsevier
Additional Information:	The copyright of this article belongs to Elsevier.
Keywords:	B. Glasses, metallic;B. Mechanical properties at ambient temperature;B. Plastic deformation mechanisms;C. Heat treatment;F. Mechanical testing
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	10 Apr 2006
Last Modified:	19 Sep 2010 04:25
URI:	http://eprints.iisc.ac.in/id/eprint/6223

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