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Load partition during hot deformation of AlSi12 and AlSi10Cu6Ni2 alloys: a quantitative evaluation of the stiffness of Si networks

  • Metals & corrosion
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Abstract

An eutectic AlSi12 alloy contains a rigid 3D network formed by the eutectic Si in the as-cast condition, which disintegrates during solution treatment. Synchrotron tomography proved that a near eutectic AlSi10Cu6Ni2 alloy also exhibits a 3D network with higher and more stable stiffness due to the presence of aluminides that retain the initial as-cast microstructure during the solubilization treatment and increase the volume fraction of rigid phases. In order to evaluate the load borne by different phases during hot deformation, in situ synchrotron experiments were carried out revealing an underestimation of the load transfer from the soft α-Al matrix to the hard silicon 3D network in the AlSi12 alloy. By taking into account the additional stiffness introduced by the local interconnectivity, the stresses in different phases in the near eutectic AlSi10Cu6Ni2 alloy were calculated. Additionally, the analysis of the aluminide Al2Cu allowed to identify its influence in the global damage of the hybrid 3D network formed by the Si and aluminides in the near eutectic AlSi10Cu6Ni2 alloy.

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Acknowledgements

The financial support from the FWF (Austrian Science Fund) project P22876-N22 is acknowledged. David Canelo-Yubero would also like to thank the partial financial support from the FWF projects P27471-N19 and P29727. The authors would like to thank the allocation of beamline at Harwi-II (DESY) in the framework of proposal I-20160441 EC and at the ESRF in the frame of proposal IN662. Authors thank T. Lippmann (Helmholz-Zentrum Geesthacht) for the support during beamtime.

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Authors and Affiliations

  1. Nuclear Physics Institute ASCR, 25068, Řež near Prague, Czech Republic

    David Canelo-Yubero

  2. Institute of Materials Science, Joining and Forming, Graz University of Technology, Kopernikusgasse 24/I, 8010, Graz, Austria

    David Canelo-Yubero

  3. Voestalpine Stahl GmbH, voestalpine-Straße 3, Linz, 4020, Austria

    Christoph Etzlstorfer

  4. FRM II, TU München, Lichtenbergstraße 1, 85748, Garching, Germany

    Robert Koos

  5. KS Kolbenschmidt GmbH, Karl-Schmidt-Straße, 74172, Neckarsulm, Germany

    Holger Germann & Thomas Steffens

  6. Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany

    Andreas Stark

  7. ESRF-The European Synchrotron, CS 40220, Grenoble Cedex 9, 38043, France

    Elodie Boller

  8. Institute of Materials Research, German Aerospace Center (DLR), Linder Höhe, 51147, Cologne, Germany

    Guillermo Requena

  9. Metallic Structures and Materials Systems for Aerospace Engineering, RWTH-Aachen University, 52062, Aachen, Germany

    Guillermo Requena

Authors
  1. David Canelo-Yubero
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  2. Christoph Etzlstorfer
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  3. Robert Koos
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  4. Holger Germann
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  5. Thomas Steffens
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  6. Andreas Stark
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  7. Elodie Boller
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  8. Guillermo Requena
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Correspondence to David Canelo-Yubero.

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Canelo-Yubero, D., Etzlstorfer, C., Koos, R. et al. Load partition during hot deformation of AlSi12 and AlSi10Cu6Ni2 alloys: a quantitative evaluation of the stiffness of Si networks. J Mater Sci 55, 14558–14570 (2020). https://doi.org/10.1007/s10853-020-05023-5

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  • DOI: https://doi.org/10.1007/s10853-020-05023-5

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