A metallographic study of the niobium-hydrogen system Part II. γ, δ, ζ and ε{lunate}-phase precipitation

  • Schober T
  • Linke U
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The observation of γ-phase precipitation in interference and polarized light contrast is reported. Characteristic surface deformation effects during the β → γ transformation are described. δ-phase precipitation was investigated in the concentration range from 100 to 200 at.% H/Nb. Precipitation occurred on {210}cplanes. The accompanying b.c.c. to f.c.c. transformation led to strong plastic deformation in β-phase areas, ζ and ε{lunate} precipitation did not affect the metallographic appearance of the β-phase domain structure. © 1976.

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  • T. Schober

  • U. Linke

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