Recrystallization in a Single Crystal Superalloy with Carbon Addition

The recrystallization tendency of single crystal superalloys with different levels of carbon at different solution temperatures and compressive stresses was investigated.The important condition for recrystallized grain formation is the solution of γ′ as-cast state.With the rise of solution temperature,the thickness of recrystallized layer increase.With the expanding of compressive strain,recrystallized grain number increase.The longer the heat treatment time,the easier the recrystallization.The γ-γ′ eutectic,large γ′ phase and carbide could all inhibit the growth of recrystallized grain.The addition of carbon has no effect on suppression of recrystallization.