Investigations on serrated flow in 8090 Al alloy and 8090 Al-SiCp composites occurring during dynamic ultra low load micro hardness (DUH) indentation.

Bauri, Ranjit and Surappa, MK (2005) Investigations on serrated flow in 8090 Al alloy and 8090 Al-SiCp composites occurring during dynamic ultra low load micro hardness (DUH) indentation. In: Materials Science & Engineering, A, 393 (1-2). pp. 22-26.

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Abstract

Occurrence of plastic instabilities during depth sensing indentation in 8090 Al alloy and 8090 Al-SiCp composites containing 8 and 15 vol.% of SiC particles have been investigated by dynamic ultra low load micro hardness (DUH) technique. The unreinforced alloy shows instabilities (serrations) in the load-displacement curve in the as-extruded (AE) and solution-treated conditions. However, the magnitude of serrations becomes negligible after ageing. Al-Li-8% SiC composite shows signs of serrations in the soln.-treated condition. On the other hand, Al-Li-15% SiC composite shows almost no or negligible serrated flow in all the conditions (as-extruded, solution-treated, and aged).

Item Type:	Journal Article
Publication:	Materials Science & Engineering, A
Publisher:	Elsevier
Additional Information:	The Copyright belongs to Elsevier.
Keywords:	Serrations;Dynamic ultra low load micro hardness (DUH);Al–Li alloy;Particle reinforced composites
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	17 Mar 2006
Last Modified:	19 Sep 2010 04:24
URI:	http://eprints.iisc.ac.in/id/eprint/5813

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