and transmission electron microscope etc testing method, change rules of microstructure and phase in Al-Mg alloy and Al-Mg-Zn alloy solidifying under high pressure as well as stability of the phases in Al-Mg alloy were investigated in the paper.
Comparing with solidification under normal pressure, the second dendrite arm spacing decreases when Al-Mg binary alloy and Al-Mg-Zn ternary alloy solidify under high pressure. The morphology of the dendrite is perfect and the primary arm gets long under hi...