... 5, May 1968, p 22 5-2 41 ; June 1968, p 29 9- 309 42 . G.P. Sabol and R. Stickler, Microstructure of Nickel-Base Superalloys, Phys. Stat. Sol., Vol 35 (No. 1), 1968, p 1 1-5 2 43 . P.S. Kotval, ... Superalloys, Metallography, Vol 1, 1969, p 25 1-2 85 44 . F.R. Morral et al., Microstructure of Cobalt-Base High-Temperature Alloys, ASM Met. Eng. Q., Vol 9, May 1969, p 1-1 6 45 . J.F. Radavich and ... strengthening agent in iron-nickel- and nickel-base superalloys. Gamma prime is spherical in iron-nickel-base and in some of the older nickel-base alloys, such as Nimonic 80A and Waspaloy. In the...