Phase composition and chemical order in the single crystal nickel base superalloy MC2
Journal Article
·
· Acta Metallurgica et Materialia
- Lab. de Microscopie Ionique, Mont Saint Aignan (France)
The time evolution of phase composition at 1,050 C in a single crystal nickel base superalloy (MC2) recently developed, is studied by means of atom-probe techniques. The results indicate that the composition of both {gamma} and {gamma}{prime} phases evolves drastically during aging. The composition of the {mu} phase was estimated for 100 h at 1,050 C. Atom-probe data demonstrate that {mu} is a Ta, W, Mo enriched-phase. No impoverishment effect of the {gamma} solid solution related to the {mu} phase precipitation was detected. The spatial distribution of {mu}-forming elements in the {gamma} phase was investigated in order to find out whether clustering occurs. Ordering phenomena related to chromium were observed in {gamma}. The long range order in the {gamma}{prime} phase was also studied. The microanalysis of the material on a (001) superstructure plane allowed the preferential sites of various species to be determined.
- OSTI ID:
- 143904
- Journal Information:
- Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 1 Vol. 42; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
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