Short-Range Order in some Nickel-Base Alloys

Abstract

The first-nearest-neighbor short-range-order and size-effect coefficients have been determined for the solid-solution alloys Ni+12% Ta, Ni+15% W, and Ni+20% Mo by the method of x-ray diffuse scattering. In these alloys a strong preference for unlike nearest neighbors was found, with the Ni+12% Ta, Ni+15% W, and Ni+20% Mo alloys having α1=−0.10, −0.12, and −0.13, respectively. The corresponding size-effect coefficients for these alloys were found to be β1=0.017, 0.015, and 0.000, respectively.