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Effect of the Surface Finish on the Cyclic Behavior of Additively Manufactured AlSi10Mg

: Scurria, Matilde; Möller, Benjamin; Wagener, Rainer; Melz, Tobias


TMS 2019, 148th Annual Meeting & Exhibition Supplemental Proceedings : 10-14 March 2019, San Antonio, USA
Cham: Springer International Publishing, 2019 (The minerals, metals & materials series)
ISBN: 978-3-030-05860-9 (Print)
ISBN: 978-3-030-05861-6 (Online)
ISBN: 978-3-030-05862-3
The Minerals, Metals and Materials Society (TMS Annual Meeting and Exhibition) <148, 2019, San Antonio/Calif.>
Conference Paper
Fraunhofer LBF ()
SLM; AlSi10Mg; additive manufacturing; cyclic material behavior; IST; fatigue

The design flexibility offered by the newest additive manufacturing technologies is attracting the attention of the automotive industry for the realization of safety-relevant components. However, the realization of complex geometries is characterized by the use of support structures which sustain surfaces with downskin angles lower than 45°. The subsequent removal of these punctual joints leaves the surface irregular and with a large amount of defects. In this work, the effect of surface imperfections on the cyclic stress–strain behavior of additively manufactured metals is evaluated. Small-scale specimens are manufactured by selective laser melting of AlSi10Mg powder. The specimens are manufactured using different build orientations, part of them are left as-built while the surface of other specimens has been polished. Incremental step tests are carried out in order to evaluate the cyclic stress-strain behavior of this material.