Effect of laser‐scan strategy on microstructure and fatigue properties of 316L additively manufactured stainless steel

Autor: Hugo Roirand, Anis Hor, Benoit Malard, Nicolas Saintier
Přispěvatelé: Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Instituto de Ciencias [Los Polvorines] (ICI ), Universidad Nacional de General Sarmiento [Los Polvorines, Buenos Aires] (UNGS), This work has been financially supportedby the French National Center forScientific Research (CNRS) as part of80PRIME program.
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Fatigue and Fracture of Engineering Materials and Structures
Fatigue and Fracture of Engineering Materials and Structures, 2022, ⟨10.1111/ffe.13845⟩
ISSN: 8756-758X
1460-2695
DOI: 10.1111/ffe.13845⟩
Popis: International audience; The particular roles of grain morphology and defects, controlled using laser-scan strategies, on the mechanical properties and the fatigue behavior of 316Lstainless steel are investigated. Microstructural characterization and X-raytomography analysis was performed to understand the genesis of polycrystal-line microstructure and defects. Tensile and fatigue tests were performed toanalyze the effect of defect population and microstructural properties on plas-ticity and damage mechanisms during monotonic and cyclic loading. Theeffect of the grain-size and shape and type of defect was carefully investigatedto evaluate the mechanisms driving the mechanical behavior under quasi-static and fatigue loading. It is shown that the laser-scan strategy determinesthe anisotropy in the plane perpendicular to the building direction. Moreover,contrary to the existing literature, for 316L obtained by AM, the grain size andshape does not affect the mechanical properties, and LoF defects drive thefatigue life, independent of the defect/grain size ratio.
Databáze: OpenAIRE
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