Effect of Zr Content on Microstructure and Properties of Zn-11%Al-8%Cu-Mg Alloy
The effects of Zraddition on microstructure and properties of Zn-11%Al-8%Cu-Mg alloy were investigated by scanning electron microscope,electron probe micro-analyser,X-ray diffraction tensile test and hardness test.The results show that Zr addition refines microstructure,the element Zr usually exists in the form of compound ZrZnAl and distributes around primary grains;the strength and hardness are enhanced after Zr addition and the properties are best when the addition of Zris 0.4%.