Abstract
Fe−Ni alloys after laser treatment were investigated by X-ray powder diffraction and scanning electron microscopy. As a result it was found out that the microstructure of alloys was reduced to fragments by laser pulse treatment. The lattice parameter value of γ-solid solution showed an abnormally high carbon content at some laser treatment conditions. X-ray investigations of laser-treated thin surface layers showed irregular carbon distribution and other alloying elements throughout the treated layer. The research of thin surface layer showed nonmonotonous dependence of γ-solid solution lattice parameter deep into the treated layer. The carbon concentration in the γ-solid solution of these laser-treated zones was more than its concentration after hardening in water and as a result, the lattice parameter of γ-solid solution increased.
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