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Numerical Determination of Secondary Dendrite Arm Spacing for IN738LC Investment Castings

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Abstract

A numerical model was developed to estimate the solidification conditions and the secondary dendrite arm spacing of equiaxed solidified IN738LC investment castings. The model, composed of geometric data, thermophysical properties, and boundary conditions, was verified by a comparison of calculated and measured process temperatures obtained from casting experiments. The computation of the secondary dendrite arm spacing was carried out from temperature gradient G, solidification rate v, and an alloy-specific parameter M, determined by means of an inverse approach. The calculated secondary dendrite arm spacing was found to be in very good agreement with metallographic measurements.

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Authors and Affiliations

  1. Neue Materialien Fürth GmbH, D-90762, Fürth, Germany

    M. M. Franke (Project Engineer Simulation) & R. M. Hilbinger (Project Manager Simulation)

  2. Metals and Alloys, University Bayreuth, D-95447, Bayreuth, Germany

    C. H. Konrad (Research Fellow) & U. Glatzel (Professor and Head of Institute)

  3. Department of Materials Science and Engineering, Institute of Science and Technology of Metals, University of Erlangen, D-91058, Erlangen, Germany

    R. F. Singer (Professor and Head of Institute)

Authors
  1. M. M. Franke
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  2. R. M. Hilbinger
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  3. C. H. Konrad
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  4. U. Glatzel
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  5. R. F. Singer
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Correspondence to M. M. Franke.

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Manuscript submitted July 2, 2010.

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Franke, M.M., Hilbinger, R.M., Konrad, C.H. et al. Numerical Determination of Secondary Dendrite Arm Spacing for IN738LC Investment Castings. Metall Mater Trans A 42, 1847–1853 (2011). https://doi.org/10.1007/s11661-010-0585-8

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  • DOI: https://doi.org/10.1007/s11661-010-0585-8

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