Simulation of local effect of reinforcement on temperature field during solidification of aluminum metal matrix composite
(1.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
2.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院)
2.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院)
Abstract: The effect of reinforcement on the solidification of pure metal matrix composites (MMCs) was simulated using a two-dimensional solidification temperature field model by the finite element method. The concept of the character length was proposed to describe the size of reinforcement local heat influential zone in MMCs solidification according to the change of the morphologies of solid-liquid interface. The relationship between the character length and the geometrical conditions, the boundary condition and physical properties of the reinforcement were studied, respectively. The results show that the width of the unit and the cold boundary temperature have no effect on the character lengths but have effect on the distance between cold boundary and reinforcement (l) and the thermal parameters of the reinforcement. An experimental rule to predict the value of the character length was derived and applied.
Key words: metal matrix composites (MMCs); numerical simulation; temperature field; finite element method; solidification