Fabrication of large-scale steel-aluminum components with homogenously distributed amorphous interfacial layer and enhanced bonding strength using modified friction stir additive manufacturing  

作　　者：M.Zhang F.C.Liu P.Xue H.Zhang L.H.Wu D.R.Ni B.L.Xiao Z.Y.Ma 

机构地区：[1]Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China

出　　处：《Journal of Materials Science & Technology》2024年第27期151-166,共16页材料科学技术(英文版)

基　　金：supported by the National Natu-ral Science Foundation of China(Nos.52375396,52034005,and 51975553);the Liaoning Provincial Department of Science and Technology(No.2023JH2/101300149);the Shenyang Science and Technology Bureau(No.22-315-6-03);and Institute of Metal Re-search,Chinese Academy of Sciences(No.2023-ZD02-01);the Liaoning Province Excellent Youth Foundation(No.2021-YQ-01);the Program of the Youth Innovation Promotion Association of the Chi-nese Academy of Sciences(No.Y2021061);the Bintech-IMR R&D Program(No.GYY-JSBU-2022-002).

摘　　要：Large-scale components of steel and aluminum alloys(Fe-Al)with high bonding strength are highly needed from space exploration to the fabrication of transportation systems.The formation of detrimental intermetallic compounds at the Al-Fe interface has limited the application range of the Fe-Al components.The modified friction stir additive manufacturing was developed for fabricating large-scale Fe-Al compo-nents with homogenously distributed interfacial amorphous layers rather than detrimental intermetallic compounds.The interfacial amorphous layers comprised an Mg-O rich amorphous layer<20 nm in thick-ness and an Al-Fe-Si amorphous layer<120 nm in thickness.The interfacial amorphous layers exhibited high thermal stability and did not change even after the post-processing heat treatment of heating at 500℃ for 20 min and aging at 170℃ for 7 h.The tensile strengths of the Fe-Al tensile specimens were increased from 160 to 250 MPa after the application of the post-processing heat treatment.The fracture occurred in the aluminum alloys instead of at the dissimilar metal interface,demonstrating that high bonding strength at the Al-Fe interface was enabled by the formation of homogenously distributed interfacial amorphous layers.

关 键 词：Modified friction stir additive manufacturing Friction stir welding Interfacial amorphous layer Post-processing heat treatment High joint strength 

分 类 号：TG1[金属学及工艺—金属学]