Microstructures and mechanical properties of AZ80 alloy treated by pulsed ultrasonic vibration

被引：17

作者：

Zhang Zhi-qiang ^{[1
]}

Le Qi-chi ^{[1
]}

Cui Jian-zhong ^{[1
]}

机构：

[1] Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110004, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2008年 / 18卷

基金：

中国国家自然科学基金;

关键词：

AZ80 magnesium alloy; pulsed ultrasonic vibration; microstructure; mechanical properties;

D O I：

10.1016/S1003-6326(10)60185-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Pulsed ultrasonic field was employed in the melt of the AZ80 magnesium alloy. The effects of pulsed ultrasonic field on microstructure and mechanical properties of AZ80 magnesium alloy were investigated. The results show that the as-cast microstructure of the AZ80 alloy with pulsed ultrasonic treatment is significantly changed. Pulsed ultrasonic field significantly decreases the gain size, changes the morphologies of the beta-Mg17Al12 phases and reduces their area fraction. It is found that pulse width of ultrasonic plays an important role on the microstructure formation of AZ80 alloy. With increasing pulse width, grains become finer and more uniform. In the range of experimental parameters, the optimum pulse width for melt treatment process is found to be 210 mu s. The mechanical tests show that the mechanical properties of the as-cast AZ80 magnesium alloy with pulsed ultrasonic treatment are much higher than those of AZ280 alloy without ultrasonic field.

引用

页码：S113 / S116

页数：4