Predicting and controlling interfacial microstructure of magnesium/aluminum bimetallic structures for improved interfacial bonding  

作　　者：Ziang Zhu Renhai Shi Andrew D.Klarner Alan A.Luo Yiqing Chen 

机构地区：[1]Materials Science and Engineering,The Ohio State University,Columbus,OH,USA [2]Materials Science and Engineering,Hefei University of Technology,Hefei,Anhui,China [3]Integrated Systems Engineering,The Ohio State University,Columbus,OH,USA [4]now at M Cubed Technologies,Newark,DE,USA

出　　处：《Journal of Magnesium and Alloys》2020年第3期578-586,共9页镁合金学报（英文）

基　　金：the National Natural Science Foundation of China[grant number 51571080].

摘　　要：In this study,an overcasting process followed by a low-temperature(200°C)annealing schedule has been developed to bond magnesium to aluminum alloys.ProCAST software was used to optimize the process parameters during the overcasting process which lead to Mg/Al bimetallic structures to be successfully produced without formation of Mg-Al intermetallic phases.Detailed microstructure evolution during annealing,including the formation and growth of Al-Mg interdiffusion layer and intermetallic phases(Al12Mg17 and Al3Mg2),was experimentally observed for the first time with direct evidence,and predicted using Calculation of Phase Diagrams(CALPHAD)modeling.Maximum interfacial strength was achieved when the interdiffusion layer formed at the Mg/Al interface reached a maximum thickness the without formation of brittle intermetallic compounds.The precise diffusion modeling of the Mg/Al interface provides an efficient way to optimize and control the interfacial microstructure of Mg/Al bimetallic structures for improved interfacial bonding.

关 键 词：Bimetallic structure Interfacial bonding CALPHAD and diffusion modeling Aluminum alloys Magnesium alloys. 

分 类 号：TB331[一般工业技术—材料科学与工程]