Modification effect of Al-30Zn-5Zr-1B on ZnAl4Y alloy

► Modification effect of Al-30Zn-5Zr-1B master alloy on ZnAl4Y alloy was investigated. ► After modification, the morphology of primary phase of ZnAl4Y alloy varied greatly. ► The primary α-Al phase occurred in hypoeutectic ZnAl4Y alloy after modification. ► Mechanical properties of the modified ZnAl4Y alloy were enhanced considerably.