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Structure evolution during the heating processes of Fe-based amorphous alloys induced by low power laser treatment
Ihor Shtablavyi, Yulia Nykyruy, Yuri Kulyk, Oleh Kovalskyi, Yuriy Plevachuk and Stepan Mudry
In this work, the effect of laser treatment on the surface morphology and atomic structure of Fe73.5Nb3Cu1Si15.5B7 amorphous alloy in the form of ribbons and powders was studied. The results of the research made it possible to establish the optimal modes of laser processing of amorphous alloys that can be used for 3D printing of bulk amorphous materials. Laser processing was performed using a low-power laser with a maximum optical power of 50 W. The investigation was carried out by means of scanning electron microscopy and X-ray diffraction method. It is shown that irradiation of amorphous ribbons with a 15 W laser leads only to ablation of the alloy, and its melting begins at a power of 25 W. Based on the results of laser processing of amorphous ribbons, the optimal conditions for melting of amorphous powders obtained from the same alloy were selected. As a result of fusing amorphous powders, amorphous-nanocrystalline composites with a nanocrystal size of about 10 nm were obtained. The results of the study will help to improve the process of 3D printing of amorphous metal alloys for practical use.
Keywords: amorphous alloys, laser treatment, 3D- printing, atomic structure, structural inhomogeneities, crystal phase
DOI: 10.32908/hthp.v54.1927