Mishurova, Tatiana und Artzt, Katia Juliane und Haubrich, Jan und Requena, Guillermo und Bruno, Giovanni (2019) New aspects about the search for the most relevant parameters optimizing SLM materials. Additive Manufacturing (25), Seiten 325-334. Elsevier. doi: 10.1016/j.addma.2018.11.023. ISSN 2214-8604.
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Offizielle URL: https://www.sciencedirect.com/science/article/pii/S2214860418307929
Kurzfassung
While the volumetric energy density is commonly used to qualify a process parameter set, and to quantify its influence on the microstructure and performance of additively manufactured (AM) materials and components, it has been already shown that this description is by no means exhaustive. In this work, new aspects of the optimization of the selective laser melting process are investigated for AM Ti-6Al-4V. We focus on the amount of near-surface residual stress (RS), often blamed for the failure of components, and on the porosity characteristics (amount and spatial distribution). First, using synchrotron x-ray diffraction we show that higher RS in the subsurface region is generated if a lower energy density is used. Second, we show that laser de-focusing and sample positioning inside the build chamber also play an eminent role, and we quantify this influence. In parallel, using X-ray Computed Tomography, we observe that porosity is mainly concentrated in the contour region, except in the case where the laser speed is small. The low values of porosity (less than 1%) do not influence RS.
elib-URL des Eintrags: | https://elib.dlr.de/130321/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | New aspects about the search for the most relevant parameters optimizing SLM materials | ||||||||||||||||||||||||
Autoren: |
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Datum: | Januar 2019 | ||||||||||||||||||||||||
Erschienen in: | Additive Manufacturing | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||
DOI: | 10.1016/j.addma.2018.11.023 | ||||||||||||||||||||||||
Seitenbereich: | Seiten 325-334 | ||||||||||||||||||||||||
Verlag: | Elsevier | ||||||||||||||||||||||||
ISSN: | 2214-8604 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | additive manufacturing, SLM, Ti-6Al-4V, X-rax Synchrotron diffraction, Computed tomography, residual stress | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||
HGF - Programmthema: | Technik für Raumfahrtsysteme | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | R SY - Technik für Raumfahrtsysteme | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Selec ALS Druckverfahren (alt) | ||||||||||||||||||||||||
Standort: | Köln-Porz | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Werkstoff-Forschung > Metallische Strukturen und hybride Werkstoffsysteme | ||||||||||||||||||||||||
Hinterlegt von: | Artzt, Katia Juliane | ||||||||||||||||||||||||
Hinterlegt am: | 14 Nov 2019 17:22 | ||||||||||||||||||||||||
Letzte Änderung: | 28 Mär 2023 23:54 |
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