In-situ development of MB2 and their effect on microstructure and mechanical properties of refractory Hf0.5Mo0.5NbTiZr high entropy alloy matrix composites

To improve the room temperature comprehensive mechanical properties of the refractory high entropy alloy Hf0.5Mo0.5NbTiZr, boron element is added to form the boride phase as the strengthening phase. The Hf0.5Mo0.5NbTiZrBx (x = 0.1, 0.3, 0.5, 0.7, and 0.9) were produced by vacuum arc melting and effect of boron element on the microstructure and room temperature mechanical properties of Hf0.5Mo0.5NbTiZr alloy was investigated. The boride MB2 phase...