Branco, R.Costa, J. D.Martins Ferreira, J. A.Capela, C.Antunes, F. V.Macek, W.2026-03-162026-03-162021-03R. Branco, J.D. Costa, J.A. Martins Ferreira, C. Capela, F.V. Antunes, W. Macek, Multiaxial fatigue behaviour of maraging steel produced by selective laser melting, Materials & Design, Volume 201, 2021, 109469, ISSN 0264-1275, https://doi.org/10.1016/j.matdes.2021.109469.0264-1275http://hdl.handle.net/10400.8/15873This paper studies the multiaxial fatigue behaviour of maraging steel samples produced by selective laser melting. Hollow cylindrical specimens with transverse circular holes are subjected to different in-phase bending-torsion loading scenarios. Fatigue crack initiation sites and fatigue crack angles are predicted from the first principal stress field. Fatigue lifetime is computed using a straightforward approach, based on a one-parameter damage law, developed via uniaxial low-cycle fatigue tests. The cyclic plasticity at the notch-controlled process zone is accounted for by combining the equivalent strain energy density concept and the theory of critical distances within a linear-elastic framework. Regardless of the multiaxial loading scenario, experimental observations and predicted lives are very well correlated.engMultiaxial fatigueBending-torsionMaraging steel18Ni300 steelSelective laser meltingStrain energy densitySWT damage parameterTheory of critical distancesNotch plasticity correctionjournal article10.1016/j.matdes.2021.1094691873-4197