Effects of elemental vaporization and condensation during heat treatment of single crystal superalloys

H. Wang, N. D'Souza, Shixiang Zhao, D. Welton, N. Warnken, R. C. Reed*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Vaporization and subsequent condensation of Ni and Al is shown to play a dominant role in the evolution of microstructure during heat treatment of an Re-containing single crystal superalloy. Thus the traditional view that matter is not exchanged with the environment - so that the thermodynamic system is closed - is shown to be incorrect. The extent of depletion of Ni and Al alters the surface chemistry, causing formation of refractory-rich precipitates and destabilization of the matrix phase, γ.

Original languageEnglish
Pages (from-to)45-48
Number of pages4
JournalScripta Materialia
Volume78-79
DOIs
Publication statusPublished - May 2014

Keywords

  • Heat treatment
  • Homogenization/solutioning
  • Nickel alloys
  • Recrystallization
  • Surface evaporation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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