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

Xiaoyu Liang (1) , Camille Robert (1) , Anis Hor (2) , Franck Morel (1)

1 LAMPA - Laboratoire Angevin de Mécanique, Procédés et InnovAtion
2 ICA - Institut Clément Ader

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.

Mots clés: Industrial and Manufacturing Engineering; Mechanical Engineering; Mechanics of Materials; General Materials Science; Modeling and Simulation

Domaines: Mécanique des matériaux [physics.class-ph]

Xiaoyu Liang, Camille Robert, Anis Hor, Franck Morel. Numerical investigation of the surface and microstructure effects on the high cycle fatigue performance of additive manufactured stainless steel 316L. International Journal of Fatigue, 2021, 149, pp.106273. ⟨10.1016/j.ijfatigue.2021.106273⟩. ⟨hal-03710642⟩