Fabrication of High Mg Containing Al-Mg Alloy Sheets by Twin Roll Strip Casting

Hyoung Wook Kim; Cha Yong Lim; Suk Bong Kang

doi:10.4028/www.scientific.net/AMR.29-30.83

Paper Titles

Surface Characterization of an Extruded 6060 Al Alloy
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Mechanical Properties of Directionally Arrayed Dendrites in the Ni₃Al Matrix Alloy
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Mechanical Properties of Micro-Porous Metals Produced by Space-Holding Sintering
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Growth and Properties of Stannite-Quaternary Cu₂ZnSnSe₄ Thin Films Prepared by Selenization of Sputtered Binary Compound Precursors
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Fabrication of High Mg Containing Al-Mg Alloy Sheets by Twin Roll Strip Casting
p.83

Warm Hydroformability and Mechanical Properties of Pre- and Post- Heat Treated Al6061 Tubes
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Synthesis and Characterization of Nitrogen Implanted Titanium Alloys
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Control of Degradation of Biocompatible Magnesium in a Pseudo-Physiological Environment by a Ceramic Like Anodized Coating
p.95

Sonoelectroplating of Sn - Bi Solder Film from EDTA Bath
p.99

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Fabrication of High Mg Containing Al-Mg Alloy Sheets by Twin Roll Strip Casting

Abstract:

Al-Mg alloy sheets with high Mg contents (3~10wt%Mg) were fabricated by twin roll strip casting. The optimum process conditions to get a good surface quality of Al-Mg strip have been suggested in this experiment. Controlling the cooling rate of cast roll was important to improve the surface quality of the strip and a compositional homogeneity through the thickness. The size of intermetallic particle like Al-Fe compound was reduced down to 1~2μm due to a high cooling rate of Al melt during strip casting. In addition, the dendrite structure was fine and the segregation of Al8Mg5 phase between grains was remarkably reduced. Therefore, the strips with a thickness of 3mm have good workability during additional hot/warm rolling processes. The hot/warm rolled Al-5wt%Mg sheets show high strength and elongation. When the rolled sheets were annealed at 300 oC for 1hr., the tensile strength and total elongation of the sheets reached at 290 MPa and 30%, respectively.