摘要
镁合金铸态组织的缺陷影响着其机械性能。在镁合金熔体中施加超声处理可以起到降低晶粒尺寸、均匀化组织的效果。总结了目前镁合金熔体中施加超声处理的研究现状,分析了超声波熔体处理的几种作用机理(空化作用理论、破碎理论、过冷形核理论、声流理论等),列举并分析了影响超声波作用效果的几种因素,展望了超声波处理在镁合金中的应用前景。
The mechanical properties of magnesium alloy are affected by the as-cast structure defects of Mg al loy. After putting the ultrasonic into molten magnesium alloy , the grain size becomes smaller and the microstructure is more homogeneous. In this paper the research on present theories （cavitation th.eory , break theory, undercooling nucleation theory and acoustic streaming theory, etc）of putting the ultrasonic treatment into molten magnesium alloy is summarized. The mechanisms of ultrasonic treatment and the factors influencing the ultrasonication effect are also analyzed. Finally, the application prospect of the ultrasonic treatment in magnesium is put forward.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2009年第3期63-66,76,共5页
Materials Reports
基金
国家高技术研究发展计划(863计划)(2006AA03Z503)
国家重点基础研究发展计划(973计划)(2007CB613705)
关键词
镁合金
超声波
空化作用
magnesium alloy, ultrasonic, cavitation
