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首页> 外文期刊>Journal of Materials Research >Microstructure and mechanical properties of MoNbTaW refractory high-entropy alloy prepared by spark plasma sintering
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Microstructure and mechanical properties of MoNbTaW refractory high-entropy alloy prepared by spark plasma sintering

机译：Microstructure and mechanical properties of MoNbTaW refractory high-entropy alloy prepared by spark plasma sintering

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摘要

The Mo25Nb25Ta25W25 refractory high-entropy alloy, which was prepared by mechanical alloying utilizing pure elemental powder and spark plasma sintering (SPS), was explored in this work to determine the effects of sintering temperature on phases, microstructure, and mechanical characteristics. The alloyed powder with single BCC structure was fabricated after 30 h of ball-milling process and then was sintered under the SPS conditions of 1700 DEG;C, 1800 DEG;C, 1900 DEG;C, along with the pressure of 50 MPa as well as the dwell time of 20 min. The findings demonstrated that the alloys consisted of BCC matrix phase and Ta and Nb-enriched FCC carbide precipitation phase. And the alloy sintered at 1800 DEG;C possessed a compressive strength of 2571 MPa and fracture strain of 14.51, which were mostly caused by grain refinement strengthening and particle strengthening. Additionally, the fracture mechanism of alloy was intergranular brittle fracture.

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