High-strength extruded magnesium alloys:A critical review  

作　　者：H.Wang X.C.Luo D.T.Zhang C.Qiu D.L.Chen 

机构地区：[1]Guangdong Key Laboratory for Advanced Metallic Materials Processing and Forming,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,Guangzhou 510640,China [2]Department of Mechanical,Industrial and Mechatronics Engineering,Toronto Metropolitan University,Toronto,Ontario M5B 2K3,Canada [3]School of Electrical and Mechanical Engineering,Guangzhou Railway Polytechnic,Guangzhou 510430,China

出　　处：《Journal of Materials Science & Technology》2024年第32期27-52,共26页材料科学技术(英文版)

基　　金：sponsored by the Key-Area Research and De-velopment Program of Guangdong Province(No.2020B010186002);the Natural Science Foundation of Guangdong for Research Team(No.2015A030312003);the Yangcheng Scholars Research Project of Guangzhou Education Bureau(No.202032806);Daolun Chen is grateful for the financial support from the Natural Sci-ences and Engineering Research Council of Canada(NSERC);Hua Wang thanks the Study Abroad Fund for supporting his study at Toronto Metropolitan University。

摘　　要：Magnesium(Mg)has great potential for application in the automotive and aerospace sectors due to its abundant resources and low density.However,the industrial applications of Mg alloys are far below alu-minum alloys.At present,most commercial Mg alloys exhibit a low yield strength of<300 MPa,and their specific strength does not exhibit an advantage over that of aluminum alloys and high-strength steels.Improving the strength of Mg alloys is one of the key topics in this field.In the past two decades,high-strength Mg alloys made by powder metallurgy and severe plastic deformation techniques have been reported,but the small sample dimension and high-cost limit their industrial production.Extru-sion can be used to fabricate bulk materials with fine-grained microstructures and improved mechanical properties,which is considered as a suitable route of producing high-strength Mg alloys at the indus-trial level.In this review,recent advances in the extrusion of different Mg alloys are briefly summa-rized,including commercial Mg alloys,high-alloyed Mg-RE alloys,and Ca-containing Mg alloys.Different strengthening strategies,including alloying,grain refinement,texture modification,etc.,are employed in developing high-strength Mg alloys,with special attention to a novel strengthening mechanism,namely hetero-deformation-induced strengthening,which has recently been applied to simultaneously improve the strength and ductility of Mg alloys.Therefore,the heterostructured Mg alloys prepared by extrusion are also introduced in this work,and the influences of alloying elements and extrusion parameters on the preparation of heterostructured Mg alloys are discussed systematically.Furthermore,this review summa-rizes the effect of post-extrusion treatment on the mechanical properties of extruded Mg alloys,along with a brief comparison of the mechanical properties between Mg and Al alloys.Finally,some poten-tial research directions for further advancing the high-performance and low-cost extruded Mg alloys are suggested.

关 键 词：Magnesium alloys EXTRUSION HETEROSTRUCTURE High strength 

分 类 号：TG1[金属学及工艺—金属学]