Effect of Heat Treatment and Alloying Element on Impact Energy Absorption of AlSi10 Casting Alloys

Abstract:

The automotive applications using heat-treatable aluminum cast alloys are designed for high impact energy which can be improved using specified casting process and different heat treatment. In this study an economical and convent squeeze casting machine was used to produce the u-profile with 3mm wall thickness under controlled solidification conditions. The casted samples were used for mechanical and metallographical characterization. The mechanical properties of alloys containing different amount of Fe, Mn und Mg were determined as a function of different heat treatment condition such as modified T7 and Silicon Spheroidization Treatment (SST). The microstructure of casted alloys were quantificational determined by a combination of light optical microscope and scanning electron microscope (SEM) equipped with an energy dispersive spectroscopy (EDS) module to identify the morphology and chemical composition of intermetallic eutectic phases. The results of Charpy impact test show that impact energy increases after modified T7 or SST heat treatment significantly compared with the as cast state. Furthermore the impact energy is less in the higher Mg containing alloys (0.15wt.%) compared with the less Mg containing alloy (0.07wt.%).

• Periodical: Materials Science Forum (Volumes 794-796)
• Pages: 267-272
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.794-796.267
• Online since: June 2014
• Authors: Salar Bozorgi*, Kevin Anders, Christoph Angermeier, Christian Chimani
• Keywords: Fractography, Impact Energy, Intermetallic Phase, Modified T7, SST, U-Profile

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