Atom probe tomography of secondary gamma ' precipitation in a single crystal Ni-based superalloy after isothermal aging at 1100 degrees C

Tan, X. P.Mangelinck, D.Perrin-Pellegrino, C.Rougier, L.Gandin, Ch.-A.Jacot, A.Ponsen, D.Jaquet, V.2014-08-292014-08-292014-08-29201410.1016/j.jallcom.2014.05.132https://infoscience.epfl.ch/handle/20.500.14299/106184WOS:000338932400061Secondary gamma' precipitation in a commercial single crystal Ni-based superalloy after the 1100 degrees C isothermal aging has been investigated by atom probe tomography. After the isothermal aging for 300 s, 1800 s and 3600 s, a bimodal size distribution of larger primary gamma' precipitates and numerous smaller secondary gamma' precipitates was obtained. It is proposed that the secondary gamma' precipitated via a non-classical nucleation mode. The coarsening of secondary gamma' precipitates well obeys the classical LSW theory. (C) 2014 Elsevier B.V. All rights reserved.High-temperature alloysAtom probe tomographyPrecipitationComposition fluctuationsAtom probe tomography of secondary gamma ' precipitation in a single crystal Ni-based superalloy after isothermal aging at 1100 degrees Ctext::journal::journal article::research article