Effect of Composite Energy-field on Microstructure and Properties of AZ31B Magnesium Roll-casting Alloy Sheet

摘要

With composite energy-field of ultrasonic field and electromagnetic field introduced into the roll-casting process, AZ31B magnesium alloy has been acquired successfully, during this process, the effect of composite field on structure and properties of AZ31B magnesium roll-casting alloy are studied. The result shows that the composite field can decrease the grain size greatly from 60-80um to 12-18um compared with the conventional roll-casting (without out-field), improving the tensile strength and yield strength by 13% and 35% respectively and the elongation increased by 82.2% (average value) .Meanwhile, the microstructure of magnesium alloy obtained with the composite field are more uniform after annealing, mechanical properties are improved greatly as well.