The effect of thermal cycling on the high-temperature creep behaviour of a single crystal nickel-based superalloy

Aymeric Raffaitin (1, 2) , Daniel Monceau (1) , Fabrice Crabos (2) , Eric Andrieu (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 Turbomeca [Bordes]

Isothermal and thermal cycling creep behaviours of a single crystal nickel-based superalloy have been studied by means of tensile tests at 1150 °C and 80 MPa. We have demonstrated that thermal cycling creep rates are faster than isothermal creep rates and that lifetimes at high temperatures are shorter for creep tests under thermal cycling conditions. Furthermore, it is shown that thermal cycling creep lifetime increases as the thermal cycle frequency decreases.

Mots clés: Nickel-based superallo; Thermal cycling creep; High temperature creep; Creep rate

Domaines: Matériaux

Aymeric Raffaitin, Daniel Monceau, Fabrice Crabos, Eric Andrieu. The effect of thermal cycling on the high-temperature creep behaviour of a single crystal nickel-based superalloy. Scripta Materialia, 2007, 56 (4), pp.277-280. ⟨10.1016/j.scriptamat.2006.10.026⟩. ⟨hal-03593753⟩