超声对7050铝合金凝固组织影响的数值模拟  

Numerical Simulation and Experimental Verification on Effects of Ultrasonic Treatment on Solidification Structure of 7050 Aluminum Alloy

作　　者：邵高建[1] 胡仕成[1] 夏晨希[1] 管付如[1] 

机构地区：[1]中南大学机电工程学院现代复杂装备设计与极端制造教育部重点实验室

出　　处：《特种铸造及有色合金》2011年第2期119-122,201,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2005CB23707)

摘　　要：采用Procast-CAFE模块,建立了7050铝合金形核和晶粒生长的数学模型,模拟了7050铝合金在不同功率超声作用下组织的演化过程。结果表明,随着超声功率增大,熔体形核率增大,晶粒细化效果更好,组织分布更均匀,平均晶粒尺寸更小。模拟结果与试验结果符合。Nucleation and grain growth model of 7050 aluminum alloy were established based on ProCAST-CAFE modules to predict the microstructural evolution of the alloy in condition of different ultrasonic powers.The results verify that,with increasing in ultrasonic power,nucleation rate in the aluminum alloy melt is increased,which results in the apparent refinement of grain size and uniform distribution of microstructure as well as fine average grain size.The simulated results are well in agreement with experimental ones.

关 键 词：7050铝合金 超声铸造 CAFE 微观组织模拟 晶粒尺寸 

分 类 号：TG292[金属学及工艺—铸造] O242.1[理学—计算数学]