Document Type
Article
Publication Date
12-15-2021
Abstract
HfNbTaTiVZr refractory high entropy alloy (RHEA) fabricated by arc melting shows the single-phase body-centered cubic (BCC) structure. Radiation-induced amorphization (RIA) is observed at 2 displacements per atom (dpa) at 298 K while the specimen remains its crystal structure at 423 K. The critical amorphization temperature (Tc) is likely within 298–423 K. RIA is mainly attributed to the accumulation of Frenkel pairs caused by elastic collisions under ion irradiation and the large atomic size mismatch in the studied RHEA facilitates the amorphization process. RIA of RHEA is for the first time reported and the finding challenges the current understanding of phase stability of RHEAs upon irradiation.
Publication Source (Journal or Book title)
Materials Letters
Recommended Citation
Zhou, J., Kirk, M., Baldo, P., Guo, S., & Lu, F. (2021). Phase stability of novel HfNbTaTiVZr refractory high entropy alloy under ion irradiation. Materials Letters, 305 https://doi.org/10.1016/j.matlet.2021.130789