The morphology and formation of gamma prime in nickel-base superalloy

The major aim of this work was concentrated on studying the formation and morphology of γ'-particles under solution treatment. Microstructural observations were made mainly with the use of scanning electron microscopy (SEM) as well as transmission electron microscopy (TEM). The experimental material was commercially available nickel-base superalloy MAR-M247 with the following chemical composition (in wt%): 8.4 chromium, 10.0 cobalt, 10.0 tungsten, 0.7 molybdenum, 3.0 tantalum, 5.5 aluminium, 1.0 titanium, 1.5 hafnium, 0.15 carbon, 0.05 zirconium, balance nickel