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Grain Boundary Engineering for the Control of Oxidation Embrittlement

  • S. Yamaura
  • Y. Igarashi
  • S. Tsurekawa
  • T. Watanabe

Abstract

The effect of grain boundary type on intergranular oxidation was studied in a nickel-40at%iron alloy. It has been found that intergranular oxidation takes place preferentially at random boundaries while low-Σ coincidence boundaries, particularly Σ3, Σ11, Σ19 and Σ27 coincidence boundaries have excellent oxidation resistance. The grain boundary engineering for the control of oxidation-assisted intergranular brittleness has been attempted by taking account important roles of the grain size, the grain boundary character distribution (GBCD) and the grain boundary connectivity. The presence of an optimal grain boundary microstructure for this purpose has been predicted.

Keywords

Intergranular Fracture Roller Speed Coincidence Site Lattice Orientation Image Microscope Random Boundary 
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

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • S. Yamaura
    • 1
  • Y. Igarashi
    • 1
  • S. Tsurekawa
    • 1
  • T. Watanabe
    • 1
  1. 1.Laboratory of Materials Design and Interface Engineering, Department of Machine Intelligence and Systems Engineering, Graduate School of EngineeringTohoku UniversitySendaiJapan

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