Effect of Ultrasonic Power on Microstructure and Properties of Al-Zn-Mg-Cu Alloy Prepared by Semi-continuous Casting
Author of the article:WANG Rui;ZHANG Haoyu;CHEN Lijia;GAN Chunlei;ZHOU Nan;WANG Shuncheng
Author's Workplace：School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 410083,China;Guangdong Institute of Materials and Processing,Guangzhou 510650,China
Key Words：Al-Zn-Mg-Cu alloy semi-continuous casting ultrasonic power grain refinement homogenization
Abstract：
The as-cast Al-6 Zn-0.9 Mg-0.2 Cu alloy ingots with a diameter of 310 mm were prepared by semi-continuous casting process with ultrasonic.The effects of ultrasonic power on microstructure and mechanical properties of as-cast Al-6 Zn-0.9 Mg-0.2 Cu alloy ingots were investigated.The results show that the grains and second phases of ingot can be refined by the ultrasonic and the solid solubility of elements in aluminum matrix can be improved.The ultrasonic power is higher,the grain and the second phase are smaller,the second phase distribution is more uniform,the solid solubility is higher,the tensile mechanical properties are higher.When the ultrasonic power increases to 210 W,the tensile strength,yield strength and elongation are 329.44 MPa,242.34 MPa and 11.97%,respectively.Compared with the ingot without ultrasonic,the tensile strength,yield strength and elongation were improved by 5.95%,11.53%and 31.25%,respectively.
