INFLUENCE OF PULSED MAGNETIC FIELD ON MICROSTRUC-TURES AND MACRO-SEGREGATION IN 2124 Al-ALLOY  

作　　者：C.Y.Ban,J.Z.Cui,Q.X.Ba,G.M.Lu and B.J.ZhangP.O. Box 317, The Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110004, China Manuscript received 10 October 2001 

出　　处：《Acta Metallurgica Sinica(English Letters)》2002年第4期380-384,共5页金属学报（英文版）

基　　金：This research was supported by National Key Basic Research and Development Programme of China "973" (No. G19990649051).

摘　　要：The structures and macro-segregation of 2124 Al-alloy were studied when a pulsed magnetic field (PMF) was applied during solidification. It is found through experi-ments that a remarkable change occurs in the solidification structures of 2124 Al-alloy under pulsed magnetic field. The eutectic phase at grain boundaries change from thick continuous eutectic network to thin discontinuous one, and the distribution of solute elements was also homogenized. The typical negative segregation phenomenon of Cu in common solidification condition was restrained, and the segregation of Mg decreased.The structures and macro-segregation of 2124 Al-alloy were studied when a pulsed magnetic field (PMF) was applied during solidification. It is found through experi-ments that a remarkable change occurs in the solidification structures of 2124 Al-alloy under pulsed magnetic field. The eutectic phase at grain boundaries change from thick continuous eutectic network to thin discontinuous one, and the distribution of solute elements was also homogenized. The typical negative segregation phenomenon of Cu in common solidification condition was restrained, and the segregation of Mg decreased.

关 键 词：aluminium alloy pulsed magnetic field MICROSTRUCTURE segrega-tion 

分 类 号：TG146.21[一般工业技术—材料科学与工程]