M. de la Garza Garza, M. Guerrero-Mata, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Mexico; V. Páramo-López, Frisa Aerospace S.A. de C.V., Santa Catarina, Mexico
The effect of different morphologies and sizes of g’ precipitates on the mechanical properties of a 909 incolloy was studied. Hot compression testing was carried out at different schedules, afterwards the samples were heat treated at various temperatures ranging from 960 to 1000ºC in order to vary the process conditions of the material, different size and morphology of g’ phase were obtained, the characterization of the samples was performed using SEM (scanning electron microscopy), TEM (transmission electron microscopy) and AFM (atomic force microscopy), some precipitates are spheroid shaped and 100 nm in size and other precipitates are needle type and 2 µm of size. The mechanical properties of the material were related to the morphology and distribution of the g’ phase, finding beneficial the presence of large precipitates inside the grains and detrimental the opposite, i.e., when these are at the boundary of the grains.
Summary: Study of the effect of morphology and size of γ’ precipitates on the mechanical properties of a 909 incolloy.
