Cr和Mg对Al-5%Fe合金中初生Al_3Fe相形貌的影响  

Effect of Cr and Mg on morphology of primary Al_3Fe phase in Al-5%Fe alloy

作　　者：李荣德[1] 赵素彦[1] 周振平[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110178

出　　处：《沈阳工业大学学报》2008年第3期284-287,共4页Journal of Shenyang University of Technology

基　　金：沈阳市科技局重点资助项目(1041024-2-03)

摘　　要：采用普通熔铸的方法研究合金元素Cr和Mg对Al-5%Fe合金铸态组织的影响,利用能谱仪分析合金中物相成分.结果表明,Cr和Mg可以明显改善合金中的初生Al3Fe相形貌:未加入合金元素时,合金中初生Al3Fe相长呈粗大的针状和针片状,加入Cr和Mg则使粗大的初生富铁相形貌转变为鱼骨状、块状和细小针状.能谱分析结果表明:Cr主要分布在富铁相中,并且鱼骨状相中的Cr含量比块状相中含量高,而Mg则主要分布在基体中.The effect of Cr and Mg on the microstructure of as-cast Al-5 % Fe alloy fabricated by fusion casting was studied. The compositions of phases in the alloy were analyzed using EDS. The results show that the morphology of primary Al3Fe phase in Al-5 % Fe alloy gets significantly improved due to the addition of Cr and Mg. The primary Al3Fe phases are thick needle plate-like before adding alloying elements, but change into fish bone-like, block-like, and thin needle-like after adding Cr and Mg. EDS analysis reveals that Cr mainly distributes in primary Al3Fe phases, and the Cr content in fishbone-like phases is higher than in block-like phase. However, Mg mainly distributes in the matrix.

关 键 词：AL-5%FE合金 铬 镁 初生Al3Fe相 形貌 

分 类 号：TG146[一般工业技术—材料科学与工程]