Influence of pulse laser irradiation on structure and mechanical properties of amorphous Fe_(73.1)Nb_3Cu_(1.0)Si_(15.5)B_(7.4) alloy

摘要

Purpose: The aim of this work was to study structure changes in Fe-based amorphous ribbon under laserradiation, determine it dependence from laser treatment parameters and establish the correlation betweenstructure and microhardness.Design/methodology/approach: Amorphous ribbons of Fe_(73.1)Nb_3Cu_(1.0)Si_(15.5)B_(7.4) alloy, obtained by rapidcooling from the melt, has been treated by pulsed laser radiation with wavelength X = 1.06 urn and pulse durationt = 130 ns. Structure transformation has been studied by means of X-ray diffraction method, which allowed usto determine the phase composition, volume fraction and grain size of crystalline phases has been determined.Findings: It has been shown, that laser treatment method allows forming an amorphous-nanocrystallinecomposite. It was found that microhardness of ribbon increases after irradiation and linearly depends on percentof crystalline phase.Practical implications: Laser treatment can be used as an substitute of isothermal heat treatment to produceamorphous-nanocrystalline materials with improved properties.Originality/value: The originality of this work is based on applying of pulse laser irradiation for modifyingstructure of amorphous Fe_(73.1)Nb_3Cu_(1.0)Si_(15.5)B_(7.4) alloy.