Paper Title:
The Effect of Dispersoids and Processing Variables on Grain Refinement of Aluminium Alloys Deformed by ECAE
  Abstract

The effect of fine, non-shearable, dispersoids on the grain refinement of aluminium alloys, severely deformed by ECAE, has been studied using a model Al-0.2%Sc alloy, during deformation by Routes A and BC (+90degrees rotation) using a 120°, or 90°, die. The microstructure in the dispersoid-containing alloy was compared to a single-phase alloy using high resolution EBSD analysis. With Route A the presence of fine dispersoids was found to significantly retard the development of new high-angle grain boundaries and the formation of a fine grain structure, by homogenising slip and inhibiting microshear bands. This difference was greatly enhanced, using Route BC. Similar results were obtained with the two die angles, but with Route A refinement tended to be slightly less effective when using the 90° die.

  Info
Periodical
Solid State Phenomena (Volume 114)
Edited by
Witold Lojkowski and John R. Blizzard
Pages
151-158
DOI
10.4028/www.scientific.net/SSP.114.151
Citation
M. Berta, P. B. Prangnell, "The Effect of Dispersoids and Processing Variables on Grain Refinement of Aluminium Alloys Deformed by ECAE", Solid State Phenomena, Vol. 114, pp. 151-158, 2006
Online since
July 2006
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Price
$32.00
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