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BRAZING OF MONBTATIZRW0.2 HIGH ENTROPY ALLOY USING ECOLOGICALLY COATED RODS
Abstract
Among the newest and best performing metallic materials are high-entropy alloys, which is why more than five thousand articles related to them have been published in the last decade. However, there are few articles that refer to the brazing behavior of new types of metallic materials. In this publication, the brazed joint between two biocompatible alloy components from the MoNbTaTiZrW0.2 system were performed using an ecological Cu-Ag-Zn alloy as filler material. The optical and SEM microscopy analyzes were performed for highlighting the microstructure of a cross-section of the brazed joint. The mutual dilution effects between the high-entropy alloys and the filler metal were quantified by EDS analyses, as well as the penetration mode of the filler metal through the gap between the parts. The soldering process between two HEA plates was performed without protection, in the atmosphere, using an oxy-gas flame with a neutral character. The analyzed joint between the high-entropy alloys had a good brazing behavior, achieving adequate wetting and adhesion of the Cu-Ag-Zn type brazing alloy on the surfaces of the joined parts. It was found that the chosen brazing alloy is very compatible with the base material, no unwanted intermetallic compounds were formed, the penetration into the capillary interstices between the samples was done correctly, without interruptions or cracks.
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