New methodology of dynamical material response of dissimilar FSWed Al alloy joint under high strain rate laser shock loading

This paper presents an innovative methodology of material characterization under high strain rate (order 107s-1) laser shock loading coupled with microstructural and mechanical features. To that scope, experimental simulation analyses have been conducted for Al alloys (AA7075-T6 AA2017-T4) dissimilar Friction Stir Welded (FSWed) AA7075-AA2017 joint, pressure 4.5 GPa (laser power density 3.5 GW/cm2). In order to perform proper in-depth model these pairs, Johnson–Cook (J-C) has Grüneisen equation state using the non-linear explicit code LS-DYNA. For first time, we provided a way differentiate between behaviour in cross-section in-plane rolling welding direction. What is more, link features properties such as microhardness, residual stresses identified parameters. By achieving this goal, bigger difference studied planes was confirmed hardening modulus, exponent sensitivity Obtained results proposed indicate potential predict dynamically stressed parts at same time can be used optimization LSP process.