Effects of Ca on Microstructure and Mechanical Properties of ZA62 Alloys

摘要

Effects of Ca element on microstructure and mechanicalproperties of ZA62 alloys were investigated by using zeissmicroscope, scanning electron microscope equipped with anenergy dispersive spectrometer, X-ray diffractometer, andelectronic universal testing machine. The results show that Ca cansignificantly refine microstructure and cause the precipitation ofMg_2Ca and Al_2Ca phases on grain boundary of ZA62 alloys. Theaddition of Ca can improve the tensile properties of alloys at roomtemperature. When the content of Ca is 2%, good properties areobtained, the tensile strength and yield strength ofMg-6Zn-2Al-2Ca alloy reaches 240.79MPa and 82.78MParespectively.