MOLD FILLING SIMULATION OF SEMI-SOLID AZ91D MAGNESIUM ALLOY
(0) Semi-solid metal casting is gaining interest in the casting industry. It offers distinct advantages over other near-net-shape casting technologies, e.g., a more homogeneous microstructure, less porosity and improved mechanical properties.Numerical simulation can be used to predict die filling, and hence to optimize die design. However, the non-Newtonian behavior of semi-solid metals is quite complex. Simulation tools developed for conventional die casting cannot be applied to semi-solid die casting.In this study, a program based on the finite different method (FDM) has been developed to predict the filling pattern in semi-solid casting of metal alloys. A power law equation was used to describe the constitutive behavior of semi-solid metals. Three power law indexes (-0.65, -0.85, and -0.95) were used in the simulation system and a series of short-shots experiments was conducted to validate the simulation results. These results showed that an exponent constant of -0.85 is a suitable value in the power law equaton for mold filling simulation of semi-solid AZ91D magnesium alloy with a piston speed of 0.5m/s and
Computer simulation Mold filling Semi-solid casting Magnesium alloys AZ91D
Ruey-Jer Weng Jer-Haur Kuo Weng-Sing Hwang Chee-Ang Loong Cheng-Kuei Jen
Department of Materials Science and Engineering, National Cheng Kung University No.1, University Roa Department of Materials Science and Engineering, National Cheng Kung University No.1, University Roa industrial Materials Institute, National Research Council Canada 75 de Mortagne Boulevard Bouchervil
国际会议
大连
英文
145-151
2007-08-19（万方平台首次上网日期，不代表论文的发表时间）