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Impact of processin...
Impact of processing gas composition on process stability and properties of PBF-LB/M processed alloy 718
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- Deckers, Tobias (författare)
- Universität Duisburg-Essen,University of Duisburg-Essen,Linde GmbH
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- Jabir Hussain, Ahmed Fardan, 1996 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kersting, L. (författare)
- Siemens AG
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- Kreutzer, A. (författare)
- Siemens AG
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- Forêt, Pierre (författare)
- Linde GmbH
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- Dubiez-Le Goff, S. (författare)
- Linde GmbH
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- Witt, G. (författare)
- Universität Duisburg-Essen,University of Duisburg-Essen
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- Kleszczynski, S. (författare)
- Universität Duisburg-Essen,University of Duisburg-Essen
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- Klement, Uta, 1962 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Hryha, Eduard, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Journal of Manufacturing Processes. - 1526-6125. ; 120, s. 712-718
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The almost unlimited design freedom of the laser-based powder bed fusion of metals (PBF-LB/M) makes this technology very attractive for industry. However, as a developing technology, it still faces some challenges when it comes to productivity and robustness, to name some. Whereas numerous studies covered the impact of laser-based parameters on material properties and robustness, the effect of the processing gas received limited attention. The objective of this study was to evaluate the effect of processing gas composition, containing helium (He) and hydrogen (H2), compared to conventionally used argon (Ar), during PBF-LB/M processing of virgin alloy 718 powder, on printing behavior and part properties. The four gases studied were Ar, Ar +30%He, Ar +30%He +2%H2, and Ar +70%He. Optical Tomography (OT) was used to monitor process stability, which unveiled a significant decrease in process-by products (spatters) between 51 % and 89 % using He and H2-containing gases. It was also found that the process gas decreased the bulk porosity from an average value of 0.08 % when processed with Ar to 0.04 % when using Ar + 70%He. The oxygen pickup by the spatter particles was reduced from 630 ppm (Ar) to 331 ppm (Ar +70%He). EBSD analysis revealed that there were no evident changes in microstructure with the processing gas. The samples processed also had similar tensile properties with yield and ultimate tensile strength of 1180 MPa and 1395 MPa, respectively. However, there was a slight increase in ductility from 16.5 % to 17.2 %, when processed with pure Ar and Ar + 70%He, respectively. This study shows that utilizing standard Ar processing atmosphere with He addition leads to a more stable process with reduced spatter, porosity and a marginal increase in ductility for Alloy 718.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Nyckelord
- Optical tomography
- EBSD
- PBF-LB/M
- Alloy 718
- Process gas
- Hydrogen
- Helium
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Deckers, Tobias
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Jabir Hussain, A ...
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Kersting, L.
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Kreutzer, A.
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Forêt, Pierre
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Dubiez-Le Goff, ...
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visa fler...
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Witt, G.
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Kleszczynski, S.
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Klement, Uta, 19 ...
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Hryha, Eduard, 1 ...
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visa färre...
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- TEKNIK OCH TEKNOLOGIER
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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