Neutron small angle scattering on Udimet 720 Ni superalloy turbine blade. Non destructive analysis of the g’ precipitation

Abstract

An investigation on thermal treatment effects on Udimet 720 Ni superalloy was performed by using neutron small angle scattering. In particular y' precipitation was considered. The sample was obtained from a turbine blade used in a generator of electricity power. The measurement was performedattheDIl in the InstituteLaue Langevinin Grenoble. The neutron wavelength wasX = 1 nm. Themicrostructuraldata were compared with those obtained by transmission electron microscopy. A satisfactory agreement appeared in the size distributions obtained by using the two techniques. The feasibility of non destructive microstructural tests was so demonstrated