%0 journal article
%@ 2352-4928
%A Yu, Shun,Spartacus, Gabriel,da Silva, Melina,Pingel, Torben Nilsson,Magnusson Åberg, Lena,Spolander, Erik,Davydok, Anton,Ghorbani, Arvin,Stålnacke, Emil,Lindgren, Kristina,Hedström, Peter,Stormvinter, Albin
%D 2025
%J Materials Today : Communications
%N 
%P 112950 
%R doi:10.1016/j.mtcomm.2025.112950
%T Micro-Focused X-ray Diffraction Imaging Analysis of Fe Nitrides and Carbides in the Compound Layer of Nitrocarburized and Gas Nitrided Steel Surfaces
%U https://doi.org/10.1016/j.mtcomm.2025.112950
 
%X Thermochemical treatments like nitrocarburizing and gas nitriding form hardened surface layers of iron nitrides and carbides, improving wear, fatigue, and corrosion resistance in steel loaded components. This study employs micro-focused X-ray diffraction (µXRD) imaging at synchrotron facilities to characterize the microstructure of nitrocarburized and gas-nitrided steel surfaces in three steel grades (46MnVS3, 34CrNiMo6, 16CrMnNiMo9-5-2). Through line profile analysis with fine-step mesh grid scanning, we spatially resolve phase distributions and elastic/plastic strains in the compound layer. The µ-phase exhibits isotropic residual strain, transitioning from expansion to compression with depth, while the γ’-phase displays anisotropic strain, expanding perpendicular to the surface and compressing parallel to it. These findings highlight µXRD potential for detailed structural analysis, enabling optimization of surface hardening processes.