METHOD OF FORMING STRONG FATIGUE CRACK RESISTANT NICKEL BASE SUPERALLOY AND PRODUCT FORMED

摘要

A novel alloy is provided having approximately the following ingredient formula:PP ______________________________________ PPElement Composition in weight %;PP______________________________________ P PNi balance PPCr 16 PPCo 18 P PMo 5.00 PPW 5.00 PPAl 2.50 PPTi 3.00 PPNb 3.00 P PZr 0.05 PPB 0.01 PPC 0.075 P P ______________________________________ PP P PThe alloy has a low solvus temperature for the &ggr;' precipitate thus facilitating metal processing and treatment and also forging of the metal. Fatigue crack propagation rate is remarkably low for metal samples cooled at rates of 20° C./min to 200° C./min.