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.
|Titolo:||Influence of as-built surfaces on the fatigue behavior of AlSi10Mg parts obtained by laser powder bed fusion|
|Data di pubblicazione:||2019|
|Appare nelle tipologie:||4.1b Atto convegno Volume|