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The Myth of Hydrogen Pores in Aluminum Castings

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Shape Casting

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

The equilibrium solubility of hydrogen in liquid and solid aluminum is reviewed. Homogeneous and heterogeneous nucleation of hydrogen as pores are evaluated. It has been determined that homogeneous nucleation of hydrogen pores is impossible. Moreover, in situ observations of pore formation in melts with high hydrogen contents are inconsistent with heterogeneous nucleation of hydrogen pores. The only mechanism for hydrogen to contribute to pore formation is the inflation of bifilms by diffusion. Hence, in the absence of bifilms in the melt, measuring and controlling hydrogen content in the melt would be unnecessary.

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Author information

Authors and Affiliations

  1. University of North Florida, Jacksonville, FL, 32224, USA

    Murat Tiryakioğlu

Authors
  1. Murat Tiryakioğlu
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Correspondence to Murat Tiryakioğlu .

Editor information

Editors and Affiliations

  1. University of North Florida, Jacksonville, FL, USA

    Murat Tiryakioğlu

  2. University of Birmingham, Birmingham, UK

    William Griffiths

  3. Cranfield University, Cranfield, UK

    Mark Jolly

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© 2019 The Minerals, Metals & Materials Society

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Tiryakioğlu, M. (2019). The Myth of Hydrogen Pores in Aluminum Castings. In: Tiryakioğlu, M., Griffiths, W., Jolly, M. (eds) Shape Casting. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-06034-3_14

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