Ceramic Inclusion in Rene' 95 Superalloy

Ceramic inclusions in as-HIPed and HIP+forged P/M superalloy specimens were studied by stereological metalography method quantitatively and by Electron Probe Microanalyser qualitatively. The ceramic inclusions in FGH95 superalloy were compared with those in Rene'95 superalloy.The present results show that the ceramic inclusions in FGH95 superalloy consists of mainly Al₂O₃ and it's complex oxides with SiO₂. different from that in Rene'95 alloy, which are complex oxides of SiO₂ with MgO and AlSiOa with MgO.The amount of inclusions in FGH95 superalloy is about three times as much as that in Rene'95 superalloy, and the inclusions in FGH95 superalloy are also coarser than those in Rene'95 alloy.