Morphological Features of Silicon Rich Phase in Powder Thixoformed Spray Atomized Hyper-Eutectic Al-Si Alloy

M. Kiani; Hossein Aashuri; S. Nategh; A. Foroughi; A. Narimannezhad; Ali Khosravani

doi:10.4028/www.scientific.net/SSP.141-143.493

Paper Titles

Study on Semi-Solid Continuous Roll-Casting Strips of AZ91D Magnesium Alloy
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X-Ray Microtomography Investigation of the Effect of Ba Additions on the Microstructure of Partially Remelted Al-4%Cu Alloys
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Effect of Ultrasounds Treatment on Alloys for Semisolid Application
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Production of Semi-Solid Slurry through Heterogeneous Nucleation in Metal Matrix Nanocomposites (MMNC) Using Nano-Scale Ultrasonically Dispersed Inoculants
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Morphological Features of Silicon Rich Phase in Powder Thixoformed Spray Atomized Hyper-Eutectic Al-Si Alloy
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Effect of Reheating to the Semisolid State on the Microstructure of the A356 Aluminum Alloy Produced by Ultrasonic Melt-Treatment
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Numerical Simulation of Semi-Solid AZ91D Magnesium Alloy in Thixoforming Process
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The Semi-Solid Forming of an Improved AA6061 Wrought Aluminum Alloy Composition
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Thixoforming of Aluminium-Silicon Alloys in a Mechanical Eccentric Press
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Morphological Features of Silicon Rich Phase in Powder Thixoformed Spray Atomized Hyper-Eutectic Al-Si Alloy

Abstract:

Microstructural evolution of the spray atomized and powder thixoformed hyper-eutectic A390 aluminum alloy was investigated. The spray atomized powder revealed homogeneous and very fine silicon particles distribution, due to the rapid solidification of the alloy. The semi-solid powders were extruded into a closed die cavity through a hole for the plastic deformation of the powder particles. A drop forge of 45kg weight at different heights was used in this investigation. Remarkable rearrangement and growth of the silicon rich phase was revealed in the final stage.