Kendiliğinden ilerleyen yüksek sıcaklık sentezi yöntemi ile hafif metal içerikli yüksek entropili alaşımların üretilmesi ve geliştirilmesi

In this study, self-propagating high-temperature synthesis (SHS), a highly energy-efficient, fast, and affordable production technique, was used to create light metal alloys with high entropy that are based on AlSiTiMEIMEII (MEI, MEII = Mg, Nb, V, Mn, Cr, Fe). Experimental studies for obtaining L-HEAs can be divided into Thermodynamic Investigation, SHS Experiments, and Characterization. This study aims to get general information about LHEAs, determine the target alloy systems, and produce and characterize the final products. Metal oxide powders (TiO2, V2O5, Nb2O5, MnO2, Cr2O3, CrO3, Fe2O3) and reductants (metallic Al, Si, and Mg powders) were the primary ingredients employed in the SHS studies. The raw material mixtures were prepared as 150-200g, and SHS experiments were carried out. The alloy systems were determined following the results of the Thermodynamic Analysis, which constitutes the first stage of the thesis study. The microstructure and mechanical properties of obtained L-HEAs were investigated through extensive characterization studies with scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), and microhardness test device. As a result of the characterization studies, it has been observed that the L-HEAs are composed of multi-phase microstructures. Furthermore, there are casting cavities in the structure of L-HEAs. In future work on this Thesis study, the search for the impact of heat treatment and secondary melting process in these alloy systems is planned. This study also contributed to establishing a scientific and engineering background of a project performed by TUBITAK (The Scientific and Technological Research Council of Turkey, Project No. 118M204).