Irradiation behavior of HfNbTaTiV in comparison of HfNbTaTiZr and F82H

Based on Senkov alloy, which has been identified as BCC alloys with good ductility, this work developed the HfNbTaTiV, and explored its microstructure and mechanical properties to make a comparison between F82 H and Senkov alloy (HfNbTaTiZr). The phase diagram of HfNbTaTiV indicates that this alloy is stable with single BCC matrix at the temperature above 800°C. The mechanical properties including Vickers hardness and tensile property have been conducted to HfNbTaTiV, Senkov alloy and F82 H. The results indicate that HfNbTaTiV has higher Vickers hardness than Senkov alloy, and the yield stress and tensile strength of HfNbTaTiV are larger than that of Senkov alloy and F82 H, while elongation was found to be larger in the order of HfNbTaTiV, Senkov alloy, and F82 H. Three HEAs are ion irradiated with 6.4 MeV Fe3+ at a temperature of 300°C, the irradiation hardening of Senkov alloy is larger than that of HfNbTaTiV and F82 H. However, the TEM observation represents different results and the possibilities of this phenomenon will be discussed in this work.