Efficient acquisition of interdiffusion coefficients matrices and atomic mobilities of fcc Co-Mn-Cr alloys by combining diffusion couple experiments and HitDIC software

Reliable diffusivities and atomic mobilities of fcc Co-Mn-Cr alloys are the important keystones for establishing the accurate diffusion database for CoCrFeMnNi high-entropy alloys and other relevant alloys, but they are still missing in the literature. In this paper, diffusion couple experiments together with High-throughput Determination of Interdiffusion Coefficients (HitDIC) software were employed to efficiently obtain diffusion descriptions of fcc Co-Mn-Cr alloys. Six diffusion couples were prepared and examined to provide the prerequisite composition profiles. Feature selection and regularization techniques in HitDIC software were adopted to extract the corresponding interdiffusion coefficients and atomic mobilities. A reliable set of diffusion descriptions of the fcc Co-Mn-Cr alloys were therefore obtained and verified. Investigations of the underlying composition- and temperature-dependent diffusion behaviors were enabled and demonstrated.