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Ex-situ characteriz...
Ex-situ characterization and simulation of density fluctuations evolution during sintering of binder jetted 316L
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- Cabo Rios, Alberto, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,San Diego State University
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- Mishurova, T. (författare)
- Bundesanstalt für Materialforschung und -prüfung (BAM),Federal Institute for Materials Research and Testing
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- Cordova Gonzalez, Laura, 1989 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Persson, Mats (författare)
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- Bruno, G. (författare)
- Bundesanstalt für Materialforschung und -prüfung (BAM),Federal Institute for Materials Research and Testing,Universität Potsdam,University of Potsdam
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- Olevsky, Eugene (författare)
- University of California,San Diego State University
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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: Materials and Design. - 1873-4197 .- 0264-1275. ; 238
- 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
- Efficient density evolution during sintering of the as-printed component is vital to reach full densification and required properties of binder jet (BJT) components. However, due to the high porosity and brittle nature of the green compact, analysis of the microstructure development during sintering is very difficult, resulting in lack of understanding of the densification process. Density development from green state (57 ± 1.6 %) up to full density (99 ± 0.3 %) was characterized by high-resolution synchrotron X-Ray computed tomography (SXCT) on BJT 316L samples from ex-situ interrupted sintering tests. Periodicity of density fluctuations along the building direction was revealed for the first time and was related to the layer thickness of ∼ 42 µm during printing that decreased down to ∼ 33 µm during sintering. Sintering simulations, utilizing a continuum sintering model developed for BJT, allowed to replicate the density evolution during sintering with a mean error of 2 % and its fluctuation evolution from green (1.66 %) to sintered (0.56 %) state. Additionally, simulation of extreme particle size segregation (1 µm to 130 µm) suggested that non-optimized printing could lead to undesirable density fluctuation amplitude rapid increase (∼10 %) during sintering. This might trigger the nucleation of defects (e.g., layer delamination, cracking, or excessive residual porosity) during the sintering process.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials 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
- FEM simulation
- Synchrotron X-Ray CT
- Additive manufacturing
- Binder Jetting
- Sintering
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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