Paper Title:
Solute Content and the Tensile Behavior of High Pressure Die Cast Mg-Al Alloys
  Abstract

Binary Mg-Al alloys with varying content of aluminium from 0.5 to 12mass% have been studied. The proof stress increase in two steps whereas the ductility exhibits two correlated stepwise drops, as the aluminium content increases. The first increase in strength, and attendant drop in ductility, is observed between 4 and 5 mass% Al. The second stepwise change is observed between 10 and 12 mass% Al. These effects are connected with well defined changes in the microstructure: at 4 mass% a dispersion of β-phase intermetallic particles appears in the core region and a closed cell structure develops near the surface; at 12 mass% Al, the increased volume fraction of the β- phase intermetallics extends the interconnected network of intermetallics to include the core region as well. The micromechanics of the strengthening and decreased ductility are discussed.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
333-336
DOI
10.4028/www.scientific.net/MSF.561-565.333
Citation
A.V. Nagasekhar, C. H. Cáceres, "Solute Content and the Tensile Behavior of High Pressure Die Cast Mg-Al Alloys", Materials Science Forum, Vols. 561-565, pp. 333-336, 2007
Online since
October 2007
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