Behavior of A356 Alloy in Semi-Solid State Produced by Mechanical Stirring
This investigation studied semi-solid (SSM) aluminum-silicon alloy produced by mechanical stirring. Aluminum alloys produced by this method, are widely used instead of conventional die casting and forging processes. In this research by using a mechanical stirrer slurry maker, the effects of stirring speed, the solid fraction percent and mold temperature are investigated on micro-structure and hardness of A356 aluminum alloy in semi-solid casting. By optimizing the forming parameters, dendrite microstructure changes to globular and mechanical properties improves. This is because of breaking and globularizing dendrites of primary α-AL phase. It is determined that stirring temperature of 608°C and stirring speed of 300 RPM leads to the uniform grains distribution and therefore arrives to better hardness for the produced billets.
Hongxi Zhu and Linjiang Wang
S. Nourouzi et al., "Behavior of A356 Alloy in Semi-Solid State Produced by Mechanical Stirring", Advanced Materials Research, Vol. 402, pp. 331-336, 2012