超声处理对Mg-9Al二元镁合金Mg_(17)Al_(12)相形貌影响  

Influence of Ultrasonic Treatment on the Morphology in Mg_(17)Al_(12) of Mg-9Al Binary Magnesium Alloy

作　　者：张志强[1] 乐启炽[1] 崔建忠[1] 

机构地区：[1]东北大学材料电磁过程研究教育部重点实验室,辽宁沈阳110004

出　　处：《稀有金属材料与工程》2008年第1期173-175,共3页Rare Metal Materials and Engineering

基　　金：国家十一五支撑计划重点项目(2006BAE04B01-5);国家自然科学基金项目(50574028);国家重点基础研究发展计划(973)项目(2007CB613702)

摘　　要：研究了超声处理对Mg-9Al合金Mg17Al12相形貌的影响。结果表明:经过高强超声处理的Mg-9Al二元镁合金,Mg17Al12相得到显著细化,同时从连续形貌变成了不连续形貌,在凝固过程中球状Mg17Al12相形成,并均匀分布在镁合金基体中。Phase morphology is one of the most important microstructural characteristics determining the mechanical and therefore the service performance of polycrystalline materials. Now, phase morphology of alloy can be changed by chemical modification, superheating treatment and electromagnetic vibration. The effect of ultrasonic treatment on the Mg17Al12 morphology in Mg-9.0wt% A1 alloy is studied in this paper. The result shows that with employing high-intensity ultrasonic vibration during the solidifying of Mg-9.0wt% Al, the Mg17Al12 in the entire cross section of the billet is significantly refined and its morphology exhibited the change from continuous to discontinuous morphology. Spherical Mg17Al12 is formed during solidification of billet treated with high-intensity ultrasonic vibration.

关 键 词：镁合金 微观组织 超声处理 相形貌 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TB559[金属学及工艺—金属材料]