Microstructure and Aging Behavior of AZ91 Mg Alloy Fabricated by Inclined Cooling Plate

Sung Yong Shim; Su Gun Lim

doi:10.4028/www.scientific.net/SSP.116-117.350

Paper Titles

Effect of Preheating Temperature of Multiplex-Type Slurry Cup on the Morphology of Primary Solid Phase of Semi-Solid Slurry
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Effect of Partial Remelting Procedure on the Microstructural Evolution of 7075 Al Wrought Alloy for Thixoextrusion
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Dynamic Mechanical Properties of Continuously Cast Al Alloy in Electromagnetic Stirrer
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Effect of Vertical Electromagnetic Stirring on the Grain Refinement of A356 Aluminum Alloy Inoculated by Al-5Ti-B
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Microstructure and Aging Behavior of AZ91 Mg Alloy Fabricated by Inclined Cooling Plate
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Fabrication, Microstructure and Mechanical Properties of a SiCw/ZK51A Mg Composite by Semi-Solid Extrusion Directly Following Liquid Infiltration
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Development of Cup-Cast Method; Semi-Solid Slurry Preparation without External Stirring Force
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The MSCP Process for Semi-Solid Slurry Production
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A Novel Technique to Produce Metal Slurries for Semi-Solid Metal Processing
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HomeSolid State PhenomenaSolid State Phenomena Vols. 116-117Microstructure and Aging Behavior of AZ91 Mg Alloy...

Microstructure and Aging Behavior of AZ91 Mg Alloy Fabricated by Inclined Cooling Plate

Abstract:

Semi-solid AZ91 magnesium alloys were produced using a cooling plate followed by quenching in the mold. The cast and T6 heat treated microstructures were microscopically characterized and subjected to hardness tests. It was found that the resultant microstructure in water quenched semi-solid specimen were finer than that in conventional permanent mold cast specimen. The hardness tests also showed that the hardness of quenched semi-solid cast specimen was higher than that of permanent mold cast specimen. This was attributed to large amount of precipitates which results from fine precipitation of eutectic phase at intergranular areas during the aging treatment after its complete dissolution.