Chemical segregation and coarsening of γ′ precipitates in Ni-based superalloy during heat treatment in alternating magnetic field

The effect of heat treatment with the aid of an alternating magnetic field (AMF) on chemical segregation and morphology evolution of γ′ precipitates in the DZ483 superalloy was investigated. It was found that the application of the AMF during heat treatment significantly reduced chemical segregation, increased the mean particle size and accelerated morphology transition. These phenomena could be attributed to the enhanced diffusivity of alloying elements in the AMF, which was proved by diffusion experiments.