The role of thermal expansion and composition changes in the temperature dependence of the lattice misfit in two-phase γ/γ′ superalloys

Yu N. Gornostyrev, O. Yu Kontsevoi, K. Yu Khromov, M. I. Katsnelson, Arthur J Freeman

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The relative role of thermal expansion and composition changes in the temperature dependence of the lattice misfit in γ/γ′ alloys was investigated on the basis of ab initio calculations. We show that over a wide temperature range, up to approximately 0.6Tmelt, the lattice misfit is determined by the difference in thermal expansion of γ and γ′ phases and exhibits 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
Pages (from-to)81-84
Number of pages4
JournalScripta Materialia
Volume56
Issue number2
DOIs
Publication statusPublished - Jan 2007

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heat resistant alloys
Superalloys
Thermal expansion
thermal expansion
temperature dependence
Chemical analysis
Temperature
temperature

Keywords

  • Ab initio electron theory
  • Lattice misfit
  • Nickel alloys
  • Platinum group metals
  • Thermally activated processes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Science(all)
  • Metals and Alloys

Cite this

The role of thermal expansion and composition changes in the temperature dependence of the lattice misfit in two-phase γ/γ′ superalloys. / Gornostyrev, Yu N.; Kontsevoi, O. Yu; Khromov, K. Yu; Katsnelson, M. I.; Freeman, Arthur J.

In: Scripta Materialia, Vol. 56, No. 2, 01.2007, p. 81-84.

Research output: Contribution to journalArticle

Gornostyrev, Yu N. ; Kontsevoi, O. Yu ; Khromov, K. Yu ; Katsnelson, M. I. ; Freeman, Arthur J. / The role of thermal expansion and composition changes in the temperature dependence of the lattice misfit in two-phase γ/γ′ superalloys. In: Scripta Materialia. 2007 ; Vol. 56, No. 2. pp. 81-84.
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