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Numerical investigation of the surface and microstructure effects on the high cycle fatigue performance of additive manufactured stainless steel 316L

Article dans une revue avec comité de lecture
Author
LIANG, Xiaoyu
ROBERT, Camille
HOR, Anis
110103 Institut Clément Ader [ICA]
ccMOREL, Franck
211916 Laboratoire Angevin de Mécanique, Procédés et InnovAtion [LAMPA]

URI
http://hdl.handle.net/10985/22220
DOI
10.1016/j.ijfatigue.2021.106273
Date
2021-04-09
Journal
International Journal of Fatigue

Abstract

This paper aims to study the individual and competitive effects of surface defects and microstructural compo­nents in an AM 316L by numerical methods. Based on the microstructure sensitive modeling framework, nu­merical simulations of models in different surface states with virtual quasi-realistic explicit microstructures are performed. Problems encountered during the establishment of the numerical polycrystalline aggregate model are discussed, including the grain morphology, the strongly textured microstructure with preferential crystallo­graphic directions, roughness and surface defect. A statistical method based on generalized extreme value dis­tribution along with a non-local method is used to describe the stochasticity of microstructural attributes. Simulations of differently configured explicit microstructure models are analyzed and discussed.

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