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

作　　者：张志强 乐启炽 崔建忠 

机构地区：[1]Key Laboratory of Electromagnetic Processing of Materials of Ministry of Education,Northeastern University

出　　处：《中国有色金属学会会刊：英文版》2008年第A01期113-116,共4页Transactions of Nonferrous Metals Society of China

基　　金：Projects(2007CB613701;2007CB613702)supported by the National Basic Research Program of China;Project(50574028)supported bythe National Natural Science Foundation of China;Project(2006BAE04B01-5)supported by the National Key Technology R&D Programof China;Project(B07015)supported by the 111 Project of China

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 grain size,changes the morphologies of theβ-Mg_(17)Al_(12) phases and reduces their area fraction.It is found that pulsc 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 210μs.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 AZ80 alloy without ultrasonic field.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 grain size, changes the morphologies of the β-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 210us. 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 AZ80 alloy without ultrasonic field.

关 键 词：镁合金 热处理 过热温度 AZ80合金 

分 类 号：TG146.22[一般工业技术—材料科学与工程]