ATOM-PROBE INVESTIGATION OF THE EARLY STAGES OF DECOMPOSITION IN A NICKEL-BASE SUPERALLOY

Sylvain Chambreland (1) , D. Blavette (1) , Monique Bouet (1)

1 GPM - Groupe de physique des matériaux

A conventional time of flight atom-probe has been used for the investigation of the early stages of precipitation of γ' phase in a nickel base superalloy. The microstructure parameters, as derived from concentration profiles, have been studied as a function of the aging time at 650°C. For aging times smaller than a few hours, the precipitate composition varies in a large extent while the particle size remains nearly constant. In contrast, in the coarsening stage γ' precipitates reach their equilibrium composition after the first 25 hours.

Domaines: Articles anciens

Sylvain Chambreland, D. Blavette, Monique Bouet. ATOM-PROBE INVESTIGATION OF THE EARLY STAGES OF DECOMPOSITION IN A NICKEL-BASE SUPERALLOY. Journal de Physique Colloques, 1987, 48 (C6), pp.C6-361-C6-366. ⟨10.1051/jphyscol:1987659⟩. ⟨jpa-00226867⟩