Enhancing Fe content tolerance in A356 alloys for achieving low carbon footprint aluminum structure castings  

作　　者：Guodong Niu Jianfeng Wang Jinwen Ye Jian Mao 

机构地区：[1]College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China [2]China Science Lab,General Motor’s Global Research and Development,Shanghai 201206,China

出　　处：《Journal of Materials Science & Technology》2023年第30期180-191,共12页材料科学技术（英文版）

基　　金：We would like to thank the Analytical&Testing Center of Sichuan University for providing the DFT simulation tools.We also would like to thank Ruifeng Zhang for providing the software Miedema Calculator4.3.

摘　　要：Low carbon footprint aluminum structure castings are the mainstream development direction of alu-minum alloys in the future.Enhancing the Fe content tolerance upper limit in casting aluminum alloys is considered an effective way to promote the application of recycled aluminum production.In this work,it was found that with the Ce and TiCN NPs(nanoparticles)addition simultaneously to A356 alloys,the acicular Fe-rich phases(β-Al 5 FeSi)which damages the properties can be changed into beneficial phases(core-shell heterostructures)for the alloy,and hence the mechanical properties of A356 alloys can be im-proved.The TiCN nanoparticles and rare element Ce play crucial roles in the formation of core-shell het-erostructures.The formation mechanism of core-shell heterostructure was also systematically researched from the perspective of thermodynamics and kinetics.This study provides a simple and feasible strategy to eliminate the harmful effects of Fe impurity and contributes to the industrialization of low carbon footprint aluminum structure castings.

关 键 词：A356 casting aluminum alloys HETEROSTRUCTURE Carbon neutral TiCN nano particles Mechanical properties 

分 类 号：TG292[金属学及工艺—铸造] TB333[一般工业技术—材料科学与工程]