Rafting prediction criterion for nickel-base single crystals under multiaxial stresses and crystallographic orientation dependence of creep behavior

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Abstract

Based on the relief of interfacial energy density by dislocation generation at the γ-γ′ interfaces, a rafting prediction criterion has been developed for nickel-base single crystals under multiaxial stresses. The diagrams of rafting have been presented, and confirmed by experimental results. The rafting process has been analyzed quantitively by the relief of interfacial energy. The criterion has been applied to study the creep behavior. The example of creep life analysis shows that the criterion can be correlated satisfactorily to the crystallographic orientation dependence of creep behavior.

Original languageEnglish
Pages (from-to)585-588
Number of pages4
JournalJinshu Xuebao/Acta Metallurgica Sinica
Volume35
Issue number6
StatePublished - 1999

Keywords

  • Creep behavior
  • Crystallographic orientation dependence
  • Multiaxial stress state
  • Nickel-base single crystal superalloy
  • Rafting prediction criterion

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