Doping N/O Impurities into a MoNbTiWZr Refractory Multi-Principal Element Alloy and the Strengthening Mechanism

A MoNbTiWZr refractory multi-principal element alloy with N and O impurities was sintered by mechanical alloying (MA) followed by the hot-press sintering (HPS). The results demonstrated that the as-sintered samples were composed of two homogeneous body-centered cubic (BCC1 plus BCC2) structural phases with a small quantity of face-centered cubic (FCC) (Zr,Ti)O oxide inclusions. Subsequently, the alloy was sintered at 1500 °C for 45 min to give a...