Microstructure and mechanical properties of in-situ MC-carbide particulates-reinforced refractory high-entropy Mo0.5NbHf0.5ZrTi matrix alloy composite

摘要

Refractory high-entropy Mo0.5NbHf0.5ZrTi alloy matrix composite with MC-carbide particulates-rein-forced was prepared by arc melting. It is found that Mo0.5NbHf0.5ZrTiC0.1 and Mo0.5NbHf0.5ZrTiC0.3 alloys consist of one disordered body-centered cubic (BCC) solid solution phase as the matrix phase and MC carbide phase. MC carbide is enriched with Zr and Hf due to the higher binding strength and without any Mo. Noticeable strengthening from the carbide is not observed for C-0.1 and C-0.3 alloys while the compressive plasticity is improved slightly due to the decrease of solution strengthening for the matrix BCC disordered solid solution phase. (c) 2015 Elsevier Ltd. All rights reserved.