The Al-Fe Intermetallic Compounds and the Atomic Diffusion Behavior at the Interface of Aluminum-Steel Welded Joint

The formation of intermetallic compounds (IMC) at the Al/Fe interface determined mechanical property steel-aluminum welded joint. To understand interfacial microstructure evolution and relate diffusion mechanism atoms cross interface, effect welding parameters on IMC was studied, molecular dynamics method (MD) used to simulate process Al Fe atoms. Four temperatures (950 K, 1000 1050 1100 K) were selected in simulation model. are distributed a laminar pattern, their physical phases mainly composed Fe2Al5, controlling atomic ratio 5:2 configuration, Embedded Atom Method (EAM) potential is describe interactions between In Al-Fe system conformation, mean square displacement (MSD) coefficient different small, main path across conformation into crystal structure. along direction perpendicular interface. mechanisms vacancy interstitial mechanisms.