Effect of Aluminum Addition on the Static Recrystallization Behavior of Magnesium

Abstract:

Recrystallization kinetics of Mg alloy has been investigated in this study. Mg alloys such as Mg-3Al and Mg-6Al in weight percents were cast into rectangular shaped ingots of 20mm thickness. Solution treatment at 400°C for 24 hrs has been carried out on these ingots and pure Mg for comparison. Heat treated ingots including pure Mg were rolled at room temperature by thickness reductions of 10, 20, and 30 percents. Annealing treatment for recrystallization has been conducted on these cold-rolled plates at temperatures of 200, 300, and 400°C for various times from 1 min to 24 hrs. The microstructure observation and hardness measurement conducted on the recrystallized specimens revealed that static recrystallization at 200°C was very slow and expedited with increasing temperature, regardless of Al contents. While recrystallization behavior of Mg at 300°C appeared to be retarded by increase in Al contents, that of Mg was not affected at 400°C.

• Periodical: Materials Science Forum (Volume 724)
• Pages: 163-168
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.724.163
• Online since: June 2012
• Authors: Keun Joon Kim, Tae Kwon Ha
• Keywords: Cold Rolling, Hardness, Magnesium, Mg-Al Alloys, Static Recrystallization

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