Segregation at stacking faults within the γ′ phase of two Ni-base superalloys following intermediate temperature creep

G. B. Viswanathan, R. Shi, A. Genc, V. A. Vorontsov, L. Kovarik, C. M F Rae, M. J. Mills

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Using state-of-the-art energy dispersive spectroscopy, it has been established for the first time that there exists significant compositional variation (enrichment of Co and Cr and deficiency of Ni and Al) associated with superlattice intrinsic stacking faults created in the ordered γ′ precipitates following intermediate temperature deformation of two commercial superalloys. The results indicate that long range diffusion of these elements is intimately involved in the precipitate shearing process and is therefore closely linked to the time-dependent deformation of the alloys.

LanguageEnglish
Pages5-8
Number of pages4
JournalScripta Materialia
Volume94
DOIs
Publication statusPublished - 1 Jan 2015

Fingerprint

Stacking faults
heat resistant alloys
Superalloys
crystal defects
Precipitates
precipitates
Creep
shearing
Shearing
Energy dispersive spectroscopy
Temperature
temperature
spectroscopy
energy

Keywords

  • Ni based superalloys
  • segregation
  • stacking fault
  • STEM-HAADF

Cite this

Viswanathan, G. B. ; Shi, R. ; Genc, A. ; Vorontsov, V. A. ; Kovarik, L. ; Rae, C. M F ; Mills, M. J. / Segregation at stacking faults within the γ′ phase of two Ni-base superalloys following intermediate temperature creep. In: Scripta Materialia. 2015 ; Vol. 94. pp. 5-8.
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Segregation at stacking faults within the γ′ phase of two Ni-base superalloys following intermediate temperature creep. / Viswanathan, G. B.; Shi, R.; Genc, A.; Vorontsov, V. A.; Kovarik, L.; Rae, C. M F; Mills, M. J.

In: Scripta Materialia, Vol. 94, 01.01.2015, p. 5-8.

Research output: Contribution to journalArticle

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