Numerical simulation of gamma/gamma ' microstructural evolutions induced by TCP-phase in the MC2 nickel base single crystal superalloy
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
The influence of topologically close packed-phase (TCP-phase) precipitation on the / microstructure evolution of a single crystal superalloy has been studied. Four representative configurations of needle-shaped -phase particles observed in the MC2 alloy after creep deformation at 1050 C/160. MPa have been selected.Finite element modeling was performed on the selected configurations using a crystal plasticity framework and a viscoplastic approach.The local calculated stress/strain fields in the vicinity of TCP-phase precipitates, especially stress concentration, allow an interpretation of the observed microstructural evolutions (-precipitate orientation and thickness).Moreover, our numerical simulation brings a fruitful contribution to the understanding of the phenomenon often observed beyond needle-like -phase: the formation of a distorted / microstructure in lieu of the expected /-rafted structure. 2010 Elsevier B.V.