Alloy 718 Al–Zn–Mg–Cu alloys EBM EBSD Fe-based amorphous coating GMAW History of engineering & technology Rietveld analysis SLM Selective Laser Melting Ti-6Al-4V Ti55511 Ti6Al4V WAAM X-ray diffraction XRD additive manufacturing alloy 718 applications coating contact tip to work piece distance defects deformation diffraction directed energy deposition dislocation density electrical stickout electron backscattered diffraction electron beam melting electron beam melting (EBM)