论文部分内容阅读
This work aims to reveal the relationships between the microstructure,mechanical properties and flow behavior of die-casting AlMg_5Si_2Mn alloy.Results indicated that the microstructure of the die-cast AlMg_5Si_2Mn consists of α_1-Al grains,fine-size α_2~Al grains and(Al +Mg_2Si) eutectic.The surface layer observed has the thickness in a range of120-135 μm,while an ellipse-like surface layer edge is observed in the corner of the plate-like sample.Tensile strength and elongation(5) of the specimens are slightly decreased along the die-filling direction due to the backflow of melt.Pure(Al + Mg_2Si) eutectic layer and ultra-fine-size α_2-Al grains observed are around the overflow channels.Mass feeding is predominantly responsible for the superior mechanical properties of the round bars as compared to those of plate-like samples.
This work aims to reveal the relationships between the microstructure, mechanical properties and flow behavior of die-casting AlMg_5Si_2Mn alloy. Results indicate that the microstructure of the die-cast AlMg_5Si_2Mn consists of α_1 -Al grains, fine-size α_2 ~ Al grains and ( Al + Mg_2Si) eutectic. The surface layer observed has the thickness in a range of 120-135 μm, while an ellipse-like surface layer edge is observed in the corner of the plate-like sample. Sensitivity and elongation (5) of the specimens are slightly decreased along the die-filling direction due to the backflow of melt. Pure (Al + Mg_2Si) eutectic layer and ultra-fine-size α_2-Al grains observed are around the overflow channels. Mass feeding is predominantly responsible for the superior mechanical properties of the round bars as compared to those of plate-like samples.