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Title: Multiaxial fatigue behaviour of maraging steel produced by selective laser melting
Authors: Branco, R. 
Costa, J. D. 
Ferreira, J. A. Martins 
Capela, C. 
Antunes, F. V. 
Macek, W.
Keywords: Multiaxial fatigue; Bending-torsion; Maraging steel; 18Ni300 steel; Selective laser melting; Strain energy density; SWT damage parameter; Theory of critical distances; Notch plasticity correction
Issue Date: 2021
Project: UIDB/00285/2020 
16713 (PTDC/EMS-PRO/1356/2014) financed by Project 3599 (3599-PPCDT) and FEDER 
Serial title, monograph or event: Materials and Design
Volume: 201
Abstract: 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 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.
ISSN: 02641275
DOI: 10.1016/j.matdes.2021.109469
Rights: openAccess
Appears in Collections:I&D CEMMPRE - Artigos em Revistas Internacionais

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