Abstract
A rheological forging process to fabricate engineering components of A6061 wrought aluminum alloy with a controlled liquid fraction has been proposed and mechanical properties of the products characterized. The process uses a medium pressure of below 45 MPa and electromagnetic stirring (EMS). The processing parameters such as injection velocity, injection pressure, and stirring time were optimized to obtain improved mechanical properties. It was also possible to determine injection time and stirring time by measuring the temperature of molten metal in the sleeve. After the products were manufactured by using EMS, their microstructure and mechanical properties were investigated by image analysis, comparing to parts produced without EMS. Those products fabricated by EMS had better mechanical properties and had over 20% higher globular microstructures than those fabricated without EMS.
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