Evolution of as-Cast Microstructure of Mg-Al Alloys with Solute Content and Cooling Rate

M. Paliwal; Dae H. Kang; Elhachmi Essadiqi; In Ho Jung

doi:10.4028/www.scientific.net/AMR.409.362

Paper Titles

The Development of Novel Textures in Rare Earth Element Containing Magnesium Alloys
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HRTEM Observation of Early Stage of Precipitation in Mg-Gd-Y Alloys
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Effect of Zn Content on Aging Behavior of Binary Mg-Zn Alloys
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Effect of Zn Contents on Microstructure in AZ-Series Magnesium Alloys
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Evolution of as-Cast Microstructure of Mg-Al Alloys with Solute Content and Cooling Rate
p.362

Electrochemical Behavior of Mg-6mass%Al Alloy Corroded in Na₂SO₄ and NaCl Solutions
p.368

Effect of Grain Size on Microstructure and Aging Behavior in AM60 Magnesium Alloy
p.373

Effect of Al and Mn Contents on Microstructure in AM-Series Magnesium Alloys
p.379

Crystallographic Orientation Relationship between Discontinuous Precipitates and the Matrix in AM-Series Alloys
p.383

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Evolution of as-Cast Microstructure of Mg-Al Alloys with Solute Content and Cooling Rate

Abstract:

Although numerous solidification experiments have been conducted for Al, Cu and Si alloys to investigate microstructural features like primary and secondary dendrite arm spacing, solute distribution with in secondary arms and second phase fraction, no systematic solidification study on Mg alloys has been performed to understand the evolution of microstructural features as a function of cooling rate and solute content. The present study focuses on the experimental microstructural evolution of Mg-3, 6 and 9 wt. % Al alloys in the cooling rate range of 1 K/sec to 1000 K/sec. The results suggest that secondary dendrite arm spacing and amount of second phase formation are strongly dependent on both solute content and cooling rate.