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6568 |
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Wednesday, June 10, 2020, Hall D 3:45 PM Session Young Professionals |
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Determination of macroscopic mechanical properties of plasma sprayed W/Steel composites using image based FE simulation |
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Vishnu Ganesh* / Forschungszentrum Jülich GmbH, Ruhr-Universität Bochum, Germany Jan Willem Coenen / Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik and Ruhr University Bochum, Germany Simon Heuer/ 1Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Germany Daniel Dorow-Gerspach/ 1Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Werkstoffstruktur und -eigenschaften, Germany JiYí Matjíek/ Institute of Plasma Physics, Czech Academy of Sciences, Czech Republic Monika Vilémová/ Institute of Plasma Physics, Czech Academy of Sciences, Czech Republic Marek Janata/ Institute of Plasma Physics, Czech Academy of Sciences, Czech Republic Marius Wirtz/ 1Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Werkstoffstruktur und -eigenschaften, Germany |
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Tungsten/steel composites may be used as interlayers for the plasma facing components of future fusion reactors, reducing the stress concentration between the tungsten armor and steel construction. In the present study, composites of tungsten and SAE 410 stainless steel are sprayed in three different volume compositions, i.e. 25% vol. W, 50% vol. W and 75% vol. W, on 316-L steel substrates using atmospheric plasma spraying. The plasma spraying is carried out while keeping the substrate temperature around 420oC. For the determination of macroscopic mechanical properties, image based finite element (FE) simulation of the corresponding microstructure is carried out from scanning electron microscopy (SEM) images as the input. An open source, object-oriented code is used to develop a mesh from the SEM image, which is solved in ANSYS. The FE simulations are carried out at various virtual temperatures between room temperature and 700oC. The elastic-plastic behavior of the microstructure and the effect of the size of representative volume element on the mechanical properties are investigated. The FE simulation suggests the formation of possible crack initiation sites, which preferentially initiate in the steel due to localized plastic straining. |