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Journal of Materials Science

, Volume 29, Issue 21, pp 5739–5744 | Cite as

Behaviour of hydrogen in pure aluminium, Al-4 mass% Cu and Al-1 mass% Mg2Si alloys studied by tritium electron microautoradiography

  • H. Saitoh
  • Y. Iijima
  • K. Hirano
Papers

Abstract

The effect of lattice defects and microstructures on hydrogen distribution in pure aluminium, Al-4 mass% Cu and Al-1 mass% Mg2Si alloys has been studied by tritium electron microautoradiography. It was found that in pure aluminium and both the alloys, dislocations and grain boundaries act as short-circuiting diffusion paths and also as trapping sites for hydrogen. It was found that the Guinier-Preston (GP) zones in the Al-1 mass% Mg2Si alloy do not act as trapping sites but as repellants for hydrogen, in contrast to the GP zones in the Al-4 mass% Cu alloy in which they act as trapping sites for hydrogen. In the Al-1 mass% Mg2Si alloy, the interfaces between the matrix lattice and the metastable β′ precipitate and between the matrix lattice and the equilibrium β precipitate, were proved to be strong trapping sites for hydrogen. In the Al-4 mass% Cu alloy, the equilibrium θ precipitate itself has been found to be able to trap hydrogen.

Keywords

Hydrogen Polymer Microstructure Tritium Material Processing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • H. Saitoh
    • 1
  • Y. Iijima
    • 1
  • K. Hirano
    • 1
  1. 1.Department of Materials Science, Faculty of EngineeringTohoku UniversitySendaiJapan

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