Hot deformation behaviour of as-cast Mg-2Zn-1Mn alloy in compression: a study with processing map

Sivakesavam, O and Prasad, YVRK (2003) Hot deformation behaviour of as-cast Mg-2Zn-1Mn alloy in compression: a study with processing map. In: Materials Science and Engineering A, 362 (1-2). pp. 118-124.

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Abstract

The deformation behaviour of as-cast Mg-2Zn-1Mn alloy in the temperature range 300-500 degreesC and in the strain rate range 0.001-100 s(-1) has been studied using processing maps. For obtaining the processing map, the variation of the efficiency of power dissipation given by [2ml(m+1)] where 'm' is the strain rate sensitivity, is plotted as a function of temperature and strain rate. The map exhibited a domain of dynamic recrystallization (DRX) occurring at 450 degreesC and 0.1 s(-1) which are the optimum parameters for hot working of the alloy. The material exhibits grain boundary cracking domain with a higher efficiency at temperatures higher than 450 degreesC and at lower strain rates. At strain rates higher than 3 s-1, the material undergoes flow localization which has to be avoided in mechanical processing for obtaining consistent properties.

Item Type:	Journal Article
Publication:	Materials Science and Engineering A
Publisher:	Elsevier Science B.V
Additional Information:	Copyright of this article belongs to Elsevier Science B.V
Keywords:	Mg-2Zn-1Mn alloy;Processing maps;Dynamic recrystallization; Interface formation;Interface migration.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	12 Aug 2009 09:01
Last Modified:	19 Sep 2010 04:55
URI:	http://eprints.iisc.ac.in/id/eprint/17027

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