Effect of Copper and Nickel Addition on Mechanical Properties of A356 Alloy and Assessment of Mechanism of Pore Formation

摘要

In this study, changes in mechanical properties and hot tearing properties were investigated by adding 0.2 wt% Ni and 2 wt% Cu to Al-Si-Mg alloy. In addition, the porosity formation with regard to liquid metal cleanliness was investigated. Casting experiments have been carried out in certain compositions. The melt was degassed and up-gassed slowly. Micro 100 alloy was added to the melt to investigate the effect of the distribution of porosity on the mechanical properties. A ring permanent mould was used to test the hot tearing characteristic and a tensile test bars were poured into permanent mould to test the mechanical properties.