Fatigue behaviour of additively manufactured Ti-6Al-4V alloy: The role of defects on scatter and statistical size effect
Article dans une revue avec comité de lecture
Auteur
LE, Viet-Duc PESSARD, Etienne MOREL, FranckPRIGENT, SergeRésumé
This work is focused on the influence of defects on scatter and statistical size effect of Ti-6Al-4V alloy fabricated by the SLM process. A vast fatigue test campaign has been undertaken, for two surface conditions (as-built and machined surfaces) and two specimen geometries with different highly loaded volume sizes. It was shown, for machined specimens, that a large variety of crack initiation mechanisms is the principal origin of the fatigue scatter. Regarding the size effect, the change of the mechanism is the first order factor that governs the size effect. For as-built specimens, these effects are much less pronounced.
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Article dans une revue avec comité de lectureLE, Viet-Duc; PESSARD, Etienne; MOREL, Franck; (Journal of the Engineering Integrity Society, 2022-09)
This work focuses on the influence of defects, including porosity and surface roughness, on the high cycle fatigue behaviour of the Ti-6Al-4V titanium alloy fabricated by the Laser Power Bed Fusion (LPBF) Additive Manufacturing ...
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Communication avec acteLE, Viet-Duc; BELLETT, Daniel; MOREL, Franck; SAINTIER, Nicolas; PALIN-LUC, Thierry; PESSARD, Etienne; (MATEC Web of Conferences, 2014)
The aim of this work is to propose simple analytical tools to predict the fatigue strength of cast aluminium components as a function of the casting process and post-cast treatment. The proposed methodology is based on the ...
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Communication avec acteLE, Viet-Duc; MOREL, Franck; BELLETT, Daniel; PESSARD, Etienne; SAINTIER, Nicolas; (Elsevier, 2015)
This paper describes a microstructural-based high cycle fatigue behaviour model applied to cast Al-Si alloys used in an automobile context. These materials are characterized by the presence of different microstructural ...
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Communication avec acteLE, Viet-Duc; PESSARD, Etienne; MOREL, Franck; (EDP Sciences, 2018-05-25)
This work is focused on the influence of porosity when dealing with the fatigue behaviour of the TA6V alloys fabricated by the selective laser melting (SLM) process. The presence of porosity is one of the major issue facing ...
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Article dans une revue avec comité de lectureLE, Viet-Duc; PESSARD, Etienne; MOREL, Franck; (Elsevier, 2019)
This work is focused on the influence of porosity when dealing with the fatigue behaviour of TA6V alloys fabricated by the selective laser melting (SLM) process. The presence of porosity is one of the major issues facing ...