Study on irradiation effects of refractory bcc high-entropy alloy

We developed body-centered cubic refractory high-entropy alloys, MoNbTaTi, MoNbTaW, and MoNbTaTiW, and explored their microstructure, and mechanical properties in order to develop a new high-irradiation resistance material suitable for fusion reactor components. Three HEAs were annealed at 1200 degrees C for 48 h to form single face BCC alloys, while MoNbTaW was also annealed at 1500 degrees C. SEM inspection and EDS mapping have both validated this result. The Vickers hardness of three HEAs was investigated, and the stable results indicate that they are all stable at elevated temperatures. Three HEAs are ion irradiated with 6.4 MeV Fe3+ at a temperature of 500 degrees C, and the irradiation hardening is examined using nanoindentation. In comparison to pure tungsten, the three HEAs exhibit increased resistance to irradiation.

Automated summary

We developed new body-centered cubic refractory high-entropy alloys with high-irradiation resistance suitable for fusion reactor components. The microstructure and mechanical properties of these alloys were investigated, showing stable behavior at elevated temperatures and increased resistance to irradiation compared to pure tungsten.