Multiaxial fatigue behaviour of maraging steel produced by selective laser melting

This 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 angles predicted from first principal stress field. lifetime is computed using a straightforward approach, based on one-parameter damage law, developed via uniaxial low-cycle tests. The cyclic plasticity at notch-controlled process zone accounted for combining equivalent strain energy density concept theory critical distances within linear-elastic framework. Regardless scenario, experimental observations lives very well correlated.