Paper Title:
Grain Refinement in Magnesium Alloy AZ31 during Hot Deformation
  Abstract

The deformation behavior and structure changes of magnesium alloy AZ31 were studied in compression at temperatures ranging from 523K to 673K and at a strain rate of 3 x 10-3 s-1. They depend sensitively on deformation temperature. At high temperatures, grain fragmentation takes place due to frequent formation of kink bands initially at corrugated grain boundaries and then in grain interiors, followed by full development of new grains in high strain. At lower temperatures, in contrast, twinning takes place in rather coarse grains and kink bands are formed mainly in finer original ones in low strain. It is concluded that new grain evolution can be controlled by a deformation-induced continuous reaction resulting in grain fragmentation by kink bands, i.e. continuous dynamic recrystallization (cDRX). The latter is discussed comparing with conventional, i.e. discontinuous, DRX.

  Info
Periodical
Materials Science Forum (Volumes 467-470)
Edited by
B. Bacroix, J.H. Driver, R. Le Gall, Cl. Maurice, R. Penelle, H. Réglé and L. Tabourot
Pages
531-536
DOI
10.4028/www.scientific.net/MSF.467-470.531
Citation
X. Y. Yang, H. Miura, T. Sakai, "Grain Refinement in Magnesium Alloy AZ31 during Hot Deformation", Materials Science Forum, Vols. 467-470, pp. 531-536, 2004
Online since
October 2004
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$32.00
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