High strain rate effect on tensile ductility and fracture of AM fabricated Inconel 718 with voided microstructures

[Display omitted] •New empirical model to predict porosity type and growth rates in Inconel718.•Model used to optimise laser melting process for Inconel718.•Electromagnetic Ring Expansion Tests on additively manufactured Inconel718.•Significant strain rate effects on alloy ductility observed together with new trends. The paper describes Electromagnetic Ring Expansion Tests (ERET) performed on Laser Melting Powder Bed Fusion (LPBF) Inconel 718 stress relieved test pieces, to establish the effect of a randomly dispersed spherically voided microstructure on tensile ductility, fracture, and fragmentation at high strain rate (10−3