Notch Effect on Fatigue and Creep/Fatigue Interaction Properties of GH132 Disk Superalloy

Iron-base disk superalloy GH132 is susceptible to LCF notchsensitivity,even it has no stress rupture notch sensitivity at elevated temperature. The creep/fatigue interaction lives to fracture of GH132 for notch and smooth specimens both exist "nose" curves with maximum lives to fracture. In the regime above the "nose" alloy is susceptible to notch sensitivity. Below and near the "nose" regime, lives to fracture of notch specimens are longer than smooth specimens. For turbine disk alloy development is nesessary to raise the strength and to improve the ductility both.