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Shape Casting pp 143-150 | Cite as

The Myth of Hydrogen Pores in Aluminum Castings

  • Murat TiryakioğluEmail author
Conference paper
Part of the The Minerals, Metals & Materials Series book 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.

Keywords

Supersaturation Fracture pressure Microporosity Nucleation Growth 

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.University of North FloridaJacksonvilleUSA

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