Energy-based critical plane fatigue methods applied to additively manufactured 18Ni300 steel. (May 2023)

• Record Type: Journal Article
• Authors: Cruces, A.S.; Branco, R.; Borrego, L.P.; Lopez-Crespo, P.
• Is Part Of: International journal of fatigue. Volume 170(2023)
• Publication Date: 2023-05
• Subjects: Biaxial fatigue -- Mean stress -- 18Ni300 maraging steel -- 18Ni300 AM -- Critical plane methods; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2023.107548
• Languages: English
• ISSNs: 0142-1123

Abstract

Highlights: Fatigue resistance of additively manufactured 18Ni300 steel under multiaxial loads. The fatigue life and crack orientation are studied for different load paths. Analysis performed with energy based critical plane methods. Understanding of the normal stress effect on the fatigue behaviour of 18Ni300. Abstract: In this work, the uniaxial and biaxial fatigue behaviour of maraging steel (18Ni300) obtained by additive manufacturing was studied. The material was evaluated using several biaxial load paths and different load levels. The predictive capacity of the fatigue life and crack initiation angle of the critical plane methods of Liu (I and II), and Chu, Conle, and Bonnen (CCB) were evaluated. The results obtained showed that normal stresses had a strong effect on the fatigue life. In general, the best estimates of the useful life and initial crack angle prediction were obtained with the CCB method.