from the conferences organized by TANGER Ltd.
The present work is focused on the synthesis of inequiatomic AlCoCrFeNiTi0.5 high entropy alloy (HEA) with composite structure reinforced by TiC nanoparticles. The initial alloy was prepared by mechanical alloying (MA) in a planetary ball mill, compacted by spark plasma sintering (SPS) and heat treated to obtain better microstructure. Microstructure and mechanical behavior of the SPS-ed compacts prior to and after the heat treatment were investigated. The bulk samples were composed of nano-grained mixture of FCC solid solution, ordered BCC phase and in-situ formed TiC nanoparticles. The high hardness of 803 HV and 564 HV of the alloy in SPS-ed and heat treated state was measured with bending strength of the latter reaching a value of 2 GPa. It was shown that a fabrication of TiC reinforced HEA nanocomposites with excellent mechanical properties can be achieved.
Keywords: High entropy alloy, powder metallurgy, sintering© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.