The Influence of Heat Treatments for Laser Welded Semi Solid Metal Cast A356 Alloy on the Fracture Mode of Tensile Specimens

G. Kunene; Gonasagren Govender; L. Ivanchev; R.D. Knutsen; H.P. Burger

doi:10.4028/www.scientific.net/SSP.141-143.169

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Study on Microstructure-Processing Relationship of a Semisolid Rheocasting A357 Aluminum Alloy
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Microstructure Evolution and Mechanical Properties of Rheoformed YL112 Aluminum Alloy
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The Influence of Heat Treatments for Laser Welded Semi Solid Metal Cast A356 Alloy on the Fracture Mode of Tensile Specimens
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Compocasting of an Al-Si-SiC_p Composite Using Powder Injection Method
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Development of In-Mold Rheocasting Process
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Development of Rheo-Diecasting of Al-Si Alloys Based on a Modified DSCP Process
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Development of Novel Hot Chamber Rheo-Diecasting Process
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The Influence of Heat Treatments for Laser Welded Semi Solid Metal Cast A356 Alloy on the Fracture Mode of Tensile Specimens

Abstract:

The CSIR rheo-process was used to prepare the aluminium A356 SSM slurries and thereafter plates (4x80x100 mm3) were cast using a 50 Ton Edgewick HPDC machine. Plates in the as cast, T4 and T6 heat treatment conditions which had passed radiography were then butt laser welded. It was found that the pre-weld as cast, T4 and post-weld T4 heat treated specimens fractured in the base metal. However, the pre-weld T6 heat treated specimens were found to have fractured in the heat affected zone (HAZ).