Abstract
Grain refinement performance of as-cast aluminum using machining chip of aluminum was studied. For this purpose, aluminum machining chips with different shape were fabricated. Aluminum wire is also used for the aluminum cast as model material of grain refiner. It is found that the machining chips act as the grain-refiner, since the lattice disregistry towards aluminum is absolutely zero. Moreover, higher cooling rate for aluminum cast with chips also influences on the grain refining of the as-cast aluminum. Although some pore and gap were found for the as-cast aluminum with the machining chips, these defects can be reduced when the mold is preheated.
