Effect of In-situ TiC Formed in the Sintering Process on the Microstructure and Mechanical Properties of NbTaVTi High Entropy Alloy

This research investigated the effect of in-situ TiC formation during the sintering process on the microstructure and mechanical characteristics of a NbTaVTi high entropy alloy (HEA). The study examined the carbon diffusion from the graphite mold and its influence on TiC formation, as well as analyzed how the size and dispersion of TiC particles influence the microstructure and mechanical properties of the alloy. The in-situ TiC-reinforced NbTaVTi HEA displays a microstructure consisting of BCC and FCC TiC phases. This structure shows a significant yield strength of 1.6 GPa and a plastic strain of 34% at room temperature. These outstanding properties of the in-situ TiC-reinforced HEA indicate its potential as a promising material for structural application.