Abstract
Refractory high-entropy alloys (RHEAs) have outstanding characteristics such as high melting point, high temperature oxidation resistance and corrosion resistance, which shows very promising application in the high temperature field; but commonly the refractory high-entropy alloys have the disadvantages of high density and poor plasticity. In this work, ZrTiHfV0.5Nb0.5Cx(x=0, 0.06, 0.12, 0.2) alloys are prepared by vacuum non-consumable arc-melting with ZrTiHfV0.5Nb0.5based. The density of ZrTiHfV0.5Nb0.5C0.2alloy is reduced to 8.014g/cm3compared to ZrTiHfV0.5Nb0.5(8.135g/cm3). The microstructure, static and high-temperature compressive strength are investigated. XRD and EDS analysis show that the microstructure of ZrTiHf0.5Nb0.5Cxalloys consists of BCC phase and HfC phase. ZrTiHfV0.5Nb0.5Cxalloys have high compression plasticity with plastic strain> 40% at room temperature, no fracture occurred during compression and yield stress is closed to 1GPa.
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