Fluidity and Mechanical Properties of Mg-xAl-Zn Alloys

摘要

The effect of Al content on the fluidity, tensile and creep properties of Mg-xAl-Zn alloy was investigated. The molten Mg-(3-11)A1-Zn alloys of 700 deg C were poured into the mould designed to estimate fluidity. Tensile and creep tests were performed for the alloys and microstructure and fractured region were observed to investigate the mechanism of creep deformation behavior. Results showed the fluidity increased with higher Al content. Creep resistance decreased while tensile strength improved with increasing Al amount. Microstructure revealed that the morphology of Mg_(17)Al_(12) is the main factor determining tensile and creep properties of as cast Mg-xAl-Zn alloys. Final purpose of this study is to develop the heat resistant Mg alloys to apply transportation systems such as automobile parts. Further study on the effect of heat treatment and additional alloying elements on the microstructure and properties of Mg-xAl alloys is going to be performed.