In the recent years the industrial expectations about metal additive manufacturing technology have exploded with an increasing focus on materials and components qualification. Qualification and certification of L-PBF components for structural application require an understanding of the links among technology, materials and fatigue performance. One dominating factor affecting fatigue strength is the as-built surface quality of the -PBF parts because surface modification would add unacceptable high costs is impossible due to geometrical complexity. The present contribution, being aimed at L-PBF applications for the automotive and aerospace sectors, deals with the AlSi10Mg alloy, the most relevant and studied Al-alloy, produced with an industrial grade L-PBF system operated by an established AM service provider. The overall objective was the determination of the link between the as-built surface quality, i.e. technology-dependent, and the fatigue data required for the structural integrity assessment of L-PBF parts. An innovative fatigue test methodology using a miniature specimen geometry was applied to the efficient investigation of L-PBF technology-dependent factors on the fatigue behavior of AlSi10Mg alloy.
Influence of as-built surfaces on the fatigue behavior of AlSi10Mg parts obtained by laser powder bed fusion / Nicoletto, G.; Gallina, L.; Riva, E.. - 24:(2019), pp. 381-389. (Intervento presentato al convegno 48th International Conference on Stress Analysis, AIAS 2019 tenutosi a ita nel 2019) [10.1016/j.prostr.2020.02.035].
Influence of as-built surfaces on the fatigue behavior of AlSi10Mg parts obtained by laser powder bed fusion
Nicoletto G.;Gallina L.;Riva E.
2019-01-01
Abstract
In the recent years the industrial expectations about metal additive manufacturing technology have exploded with an increasing focus on materials and components qualification. Qualification and certification of L-PBF components for structural application require an understanding of the links among technology, materials and fatigue performance. One dominating factor affecting fatigue strength is the as-built surface quality of the -PBF parts because surface modification would add unacceptable high costs is impossible due to geometrical complexity. The present contribution, being aimed at L-PBF applications for the automotive and aerospace sectors, deals with the AlSi10Mg alloy, the most relevant and studied Al-alloy, produced with an industrial grade L-PBF system operated by an established AM service provider. The overall objective was the determination of the link between the as-built surface quality, i.e. technology-dependent, and the fatigue data required for the structural integrity assessment of L-PBF parts. An innovative fatigue test methodology using a miniature specimen geometry was applied to the efficient investigation of L-PBF technology-dependent factors on the fatigue behavior of AlSi10Mg alloy.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
