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Article Dans Une Revue Acta Metallurgica et Materialia Année : 1994

Phase composition and chemical order in the single crystal nickel base superalloy MC2

S. Duval
  • Fonction : Auteur
S. Chambreland
P. Caron
  • Fonction : Auteur
D. Blavette

Résumé

The time evolution of phase composition at 1050°C in a new single crystal nickel base superalloy (MC2) recently developed, is studied by means of atom-probe techniques. The results indicate that the composition of both γ and γ′ phases evolves drastically during ageing. The composition of the μ phase was estimated for 100 h at 1050°C. Atom-probe data demonstrate that μ is a Ta, W, Mo enriched-phase. No impoverishment effect of the γ solid solution related to the μ phase precipitation was detected. The spatial distribution of μ-forming elements in the γ phase was investigated in order to find out whether clustering occurs. Ordering phenomena related to chromium were observed in γ. The long range order in the γ′ phase was also studied. The microanalysis of the material on a (001) superstructure plane allowed the preferential sites of various species to be determined. \textcopyright 1993.

Dates et versions

hal-01928964 , version 1 (20-11-2018)

Identifiants

Citer

S. Duval, S. Chambreland, P. Caron, D. Blavette. Phase composition and chemical order in the single crystal nickel base superalloy MC2. Acta Metallurgica et Materialia, 1994, 42 (1), pp.185--194. ⟨10.1016/0956-7151(94)90061-2⟩. ⟨hal-01928964⟩
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