Influence of SLM process parameters on the surface finish, porosity rate and fatigue behavior of as-built Inconel 625 parts
TypeArticles dans des revues avec comité de lecture
This paper is dedicated to understanding fatigue crack initiation for an Inconel 625 manufactured by SLM, using a hatching + contour procedure. In the first part of the paper, an optimum set of parameters was found to deliver the best surface roughness combined with low porosity. This process optimization, mostly focused on adjusting the volume energy density aimed at finding a compromise between an optimum densification state and a minimum number of contaminating spatters. Secondly, a fatigue test campaign has been conducted on as-built SLM samples or polished samples. The analysis of failure surfaces allowed identifying different heterogeneities at the origin of the fatigue damage for each configuration. The embedded particles on the surface of as-build specimens have been shown to play an important role in fatigue and need to be optimized or taken into account in the fatigue strength design of SLM components.
Fichier(s) constituant cette publication
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
Texture control of 316L parts by modulation of the melt pool morphology in selective laser melting ANDREAU, Olivier; KOUTIRI, Imade; PEYRE, Patrice; PENOT, Jean-Daniel; SAINTIER, Nicolas; PESSARD, Etienne; DE TERRIS, Thibaut; DUPUY, Corinne; BAUDIN, Thierry (elsevier, 2019)In this study, 316L parts were fabricated with the selective laser melting additive layer manufacturing process using unidirectional laser scan to control their texture. The melt pool shape, microstructure and texture of ...
A mechanistic approach to the Kitagawa-Takahashi diagram using a multiaxial probabilistic framework PESSARD, Etienne; BELLETT, Daniel; MOREL, Franck; KOUTIRI, Imade (ELSEVIER, 2013)The aim of this paper is to propose a flexible multiaxial modelling framework that is capable of combining two fatigue damage mechanisms so as to continuously describe the Kitagawa-Takahashi diagram. It is proposed that ...
A probabilistic model for the high cycle fatigue behaviour of cast aluminium alloys subject to complex loads KOUTIRI, Imade; BELLETT, Daniel; MOREL, Franck; PESSARD, Etienne (Elsevier, 2013)This article is dedicated to the high cycle fatigue behaviour of cast hypo-eutectic Al–Si alloys and in particular the AlSi7Cu05Mg03 alloy. In a vast experimental campaign undertaken to investigate the fatigue damage ...
Experimental analysis of spatter generation and melt-pool behavior during the powder bed laser beam melting process GUNENTHIRAM, V; PEYRE, P; SCHNEIDER, MATTHIEU; DAL, Morgan; COSTE, Frédéric; KOUTIRI, Imade; FABBRO, Rémy (Elsevier, 2018)The experimental analysis of spatter formation was carried out on an instrumented SLM set-up allowing the quantification of spatter ejections and possible correlation with melt-pool behavior. Considering nearly similar SLM ...
KANJER, A; LAVISSE, L; OPTASANU, V; BERGER, P; GORNY, Cyril; PEYRE, Patrice; HERBST, F; HEINTZ, O; GEOFFROY, N.; MONTESIN, T; MARCO DE LUCAS, M.C. (Elsevier, 2017)The effect of laser shock peening on the high temperature oxidation resistance of commercial pure titanium at high temperature (700 °C) was studied in long-time (3000 h) exposure under dry air. A reduction of the gain mass ...