Role of thermal expansion and redistribution of components on the temperature dependence of the lattice misfit in γ/γ′ superalloys

Oleg Y. Kontsevoi*, Yuri N. Gomostyrev, Arthur J. Freeman

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

The relative role of thermal expansion and redistribution of alloy components in the temperature dependence of the lattice misfit in γ/γ′ alloys is investigated on the basis of ab initio calculations. We show that in a wide temperature region up to approximately 0.6-Tmelt, the lattice misfit is determined by the difference in thermal expansion of γ and γ′ phases and shows only a slight variation. For higher temperatures the redistribution of the major alloy components between the phases becomes a leading contribution to the lattice misfit.

Original languageEnglish (US)
Pages (from-to)505-510
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume980
StatePublished - Jun 29 2007
Event2006 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 27 2006Dec 1 2006

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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