Long term coarsening of γ′ precipitates in a Ni-base superalloy

摘要: The mechanical properties of a Ni-based superalloy strongly depend on the distribution and size precipitate particle γ′ phase: Ni3(Al, Ti). Such particles grow during initial heat treatment it is very important to predict kinetic growth owing their technological application at high temperatures. In this work, we performed analysis coarsening in IN-713C long ageing times constant temperature, given an volume fraction phase, evaluation two different treatments through microstructure morphology. We found that for short times, t < 2500 h, can be approximated by linear volumetric as predicted Lifshitz, Slyozov Wagner (LSW) theory. For time greater than h rate shows asymptotic behaviour both treatments.