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Rafting of the γ′ particles in the fourth-generation single-crystal nickel-based superalloy MC-NG was investigated in situ using small-angle neutron scattering. Rafting was induced by high-temperature annealing of a predeformed sample in the absence of applied stress. The use of extended Porod’s approximation allowed the investigation of the specific area evolution during the microstructure change...
Small-angle neutron scattering was performed on polycrystals of Ni-(46-49) at.% Ti quenched in ice water from the solid solution. The presence of small precipitates of a radius of about 1 nm was found for Ni-(46, 47 and 48) at.% Ti. Assuming a composition of Ni 4 Ti 3 of the precipitates, their volume fraction varies from 7% to 0.3%. No precipitates are found if the Ti content is closer...
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