Modelling the plastic deformation during high-temperature creep of a powder-metallurgy coarse-grained superalloy

摘要

The study of creep deformation in a coarse-grained Udimet 720 superalloy obtained by powder-metallurgy reveals a good resistance associated to a dislocational deformation mechanism. A model is proposed for simulating creep and tensile curves. This model is used to understand the effectudof microstructural changes on the deformation mechanisms.