Paper Title:
Statistical Aspects of Grain Coarsening in a Fine Grained Al-Sc Alloy
  Abstract

A supersaturated Al-0.3 wt.% Sc alloy was cold deformed by ECAP to an equivalent von Mises strain of 9.2 then pre-aged at 350 °C to generate a fine-grained alloy with an average grain size of 1 μm. The microstructure was highly resistant to grain coarsening at temperatures up to 500 °C with a detailed statistical analysis showing that the initial grain size distribution was very close to lognormal and, throughout annealing, remained lognormal and the normalized frequency distribution was time/temperature invariant despite a moderate broadening of the size distribution. This behaviour is largely similar to subgrain coarsening during recovery and grain growth after recrystallization. The homogeneous evolution of the microstructure during annealing, coupled with no appreciable change in texture, is also consistent with the advanced stages of continuous recrystallization.

  Info
Periodical
Materials Science Forum (Volumes 558-559)
Edited by
S.-J.L. Kang, M.Y. Huh, N.M. Hwang, H. Homma, K. Ushioda and Y. Ikuhara
Pages
729-734
DOI
10.4028/www.scientific.net/MSF.558-559.729
Citation
M. Ferry, N. Burhan, "Statistical Aspects of Grain Coarsening in a Fine Grained Al-Sc Alloy", Materials Science Forum, Vols. 558-559, pp. 729-734, 2007
Online since
October 2007
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$32.00
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