Rheological behavior of semi-solid Mg2Si/AM60
magnesium matrix composites at steady state
magnesium matrix composites at steady state
(1. Key Laboratory of Ministry of Education for Conveyance and Equipment,
East China Jiaotong University, Nanchang 330013, China;
2. Institute of Advanced Forming & Manufacturing and Die & Mold, Nanchang University,
Nanchang 330031, China)
East China Jiaotong University, Nanchang 330013, China;
2. Institute of Advanced Forming & Manufacturing and Die & Mold, Nanchang University,
Nanchang 330031, China)
Abstract: The microstructure and rheological behavior of semi-solid Mg2Si/AM60 magnesium matrix composite at steady state were investigated. The results show that the primary α-Mg phases are knapped by mechanical stirring and the Chinese script type reinforced Mg2Si phases exist in liquid phase and grain boundary. The analysis of apparent viscosity indicates that the apparent viscosity of semi-solid Mg2Si/AM60 magnesium matrix composite at steady state increases with increasing the volume fraction of Mg2Si and solid fraction of primary α-Mg, but decreases with increasing the shearing rate and shearing time, and the apparent viscosity keeps stable when shearing time reaches 300 s.
Key words: rheological behavior; Mg2Si; semi-solid; magnesium matrix composite; apparent viscosity