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Hot workability and kinetics of hot deformation in electroslag-refined heat-resistant aluminum alloy

Jain, Narendra K and Nair, Chandrathil GK and Abraham, Kadavil P and Prasad, Yellapregada VRK (1983) Hot workability and kinetics of hot deformation in electroslag-refined heat-resistant aluminum alloy. In: Zeitschrift fuer Metallkunde, 74 (10). pp. 633-638.

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Official URL: http://materials.iisc.ernet.in/~www/publication/p8...

Abstract

RR58 [12793-49-6] Al alloy was electroslag-refined by using a $KCl-MgCl_2-MgF_2$ synthetic slag. Electroslag refining decreased the macro- and microporosity and refined the microstructure to give a finely dispersed 2nd phase. The high-temp. strength was increased with a slight decrease in hot ductility. The optimum hot-working temp. was 750 K. The apparent activation energy estd. from the temp. dependence of flow stress in tension and of steady-state creep is 155 kJ/mol for both the refined and unrefined alloy. The value suggests a mechanism based on self-diffusion. In hot torsion, the alloy had a low activation energy which suggests a mechanism of dynamic recovery involving cross slip of screw dislocations

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Carl Hanser Verlag.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 14 Jul 2008
Last Modified: 23 Feb 2012 05:21
URI: http://eprints.iisc.ernet.in/id/eprint/15013

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