XRPD APPLICATION FOR LASER-TREATED SURFACE OF FE-BASED ALLOYS STUDY

Fe-Ni alloys after laser treatment were investigated by X-ray powder d iffraction and scanning electron microscopy. As a result it was found out that the microstructure of alloys was reduced to fragments by lase r pulse treatment. The lattice parameter value of gamma-solid solution showed an abnormally high carbon content at some laser treatment cond itions. X-ray investigations of laser-treated thin surface layers show ed irregular carbon distribution and other alloying elements throughou t the treated layer. The research of thin surface layer showed nonmono tonous dependence of gamma-solid solution lattice parameter deep into the treated layer. The carbon concentration in the gamma-solid solutio n of these laser-treated zones was more than its concentration after h ardening in water and as a result, the lattice parameter of gamma-soli d solution increased.