A study of γ' particles in a nickel-based superalloy using the techniques of transmission electron microscopy and small-angle neutron scattering

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Abstract
The high strength of the nickel-based high-temperature alloys such as Nimonic PE16 depends on the presence of the gamma ', Ni3(Ti, Al), particles. Results are presented on the size and volume fraction of these particles as determined both by transmission electron microscopy (TEM) and by small-angle neutron scattering (SANS). Both techniques show good agreement with samples solution treated and aged at 700 degrees C. After 16 h the mean diameter is around 10 nm and grows roughly as the cube root of the aging time up to 10000 h at 700 degrees C. The corresponding volume fraction is of the order of 9%.