An integrated model for predicting the porosity effect on the mechanical behavior of additively manufactured Al-10Si-Mg alloy 2020-01-1075
In this work, the porosity effect on for additively manufactured Al–Si–Mg alloy was investigated, with the aid of an integrated multi-physics model. Specifically, first, a series of thermal simulations were performed to understand temperature field development under different AM operating conditions, including electron beam power, scanning speed, and preheating temperature. The porosity formation was then predicted based on thermal simulation results, which yield molten pool dimension information for predicting the lack-of-fusion porosity. Following that, with as-received microporosity data as input, a widely employed internal state variable (ISV) damage model was utilized to investigate the porosity effect on the mechanical behavior of additively manufactured Al-10Si-Mg alloy , e.g. in the form of stress-strain curves. Finally, the effective improvement of mechanical performance of AM product was analyzed through optimizing AM manufacturing conditions.
Wenhua Yang, Zhuo Wang, Caleb Yenusah, Yucheng Liu