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In-process spectroscopic detection of chromium loss during Directed Energy Deposition of alloy 718
University West, Department of Engineering Science, Division of Production Systems. (PTW)ORCID iD: 0000-0002-2527-1048
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-7663-9631
University West, Department of Engineering Science, Division of Production Systems. (PTW)ORCID iD: 0000-0001-5734-294X
University West, Department of Engineering Science, Division of Production Systems. (PTW)ORCID iD: 0000-0001-5608-8636
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2020 (English)In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 186, article id 108317Article in journal (Refereed) Published
Abstract [en]

In this work, a fast optical spectrometer was used to monitor the Directed Energy Deposition (DED) process, during the deposition of Alloy 718 samples with different laser power, thus different energy inputs into the material. Spectroscopic measurements revealed the presence of excited Cr I atoms in the plasma plume. The presence was more apparent for the samples characterized by higher energy input. The Cr depletion from these samples was confirmed by lower Cr content detected by Energy-Dispersive X-ray Spectroscopy (EDS) analysis. The samples were also characterized by higher oxidation and high-temperature corrosion rates in comparison to the samples produced with low energy input. These results prove the applicability of an optical emission spectroscopic system for monitoring DED to identify process conditions leading to compositional changes and variation in the quality of the built material.

Place, publisher, year, edition, pages
2020. Vol. 186, article id 108317
Keywords [en]
Spectroscopic system, Additive manufacturing, Directed energy deposition, Cr depletion, High-temperature corrosion
National Category
Metallurgy and Metallic Materials
Research subject
ENGINEERING, Manufacturing and materials engineering; ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-14733DOI: 10.1016/j.matdes.2019.108317OAI: oai:DiVA.org:hv-14733DiVA, id: diva2:1373761
Available from: 2019-11-28 Created: 2019-11-28 Last updated: 2020-02-21Bibliographically approved

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Kisielewicz, AgnieszkaSadeghi, EsmaeilSikström, FredrikChristiansson, Anna-KarinAncona, Antonio

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Kisielewicz, AgnieszkaSadeghi, EsmaeilSikström, FredrikChristiansson, Anna-KarinAncona, Antonio
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