J. Phys. Colloques
Volume 50, Numéro C8, Novembre 198936th International Field Emission Symposium
|Page(s)||C8-425 - C8-428|
J. Phys. Colloques 50 (1989) C8-425-C8-428
ATOM PROBE ANALYSIS OF β' PRECIPITATION IN A MODEL IRON-BASED Fe-Ni-Al-Mo SUPERALLOYM.K. MILLER1 et M.G. HETHERINGTON2
1 Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6376, U.S.A.
2 Department of Metallurgy and Science of Materials, University of Oxford, GB-Oxford OX1 3PH, Great-Britain
An atom probe field-ion microscopy study has been performed on model Fe-Ni-Al-Mo superalloys. The molybdenum and iron were found to partition preferentially to the α matrix and nickel and aluminum partition to the β' precipitates. The precipitates contained approximately 11% Fe. No evidence was found for molybdenum segregation to the precipitate-matrix interface.