|About this Abstract
||3rd World Congress on High Entropy Alloys (HEA 2023)
||Characterization and Comparison of Radiation Damage in HfMoNbTaTi and HfMoNbTaZr Refractory High Entropy Alloys by Multi-energy Helium Ion Irradiation
||Pin-Haung Chiu, Jenq-Horng Liang, Der-Sheng Chao, Che-Wei Tsai, Jien-Wei Yeh, Peng-Wei Chu
|On-Site Speaker (Planned)
Refractory HEAs (RHEAs), which consist of high melting point metallic elements, demonstrate exceptional mechanical properties even in extremely high-temperature conditions. However, it remains unclear whether these superior mechanical properties are still true in high-radiation environments. To address this issue, two RHEAs, HfMoNbTaTi and HfMoNbTaZr, were selected and multiple energy helium ion irradiation was adopted to introduce radiation damage within the alloy in this study. The mechanical properties and microstructures of RHEAs samples were examed by several characterization methods, such as nanoindentation and GIXRD method, etc. The results showed that the hardness of both compositions decreases after He+ irradiation. The lattice parameter of HfMoNbTaTi remains almost unchanged, while that of HfMoNbTaZr slightly declines by a ratio of 0.74%. It can be expected that this study would be useful to evaluate the feasibility of RHEAs utilized in high-radiation environments and gain insights into the effects of alloy elemental components on radiation resistance.
||Planned: Metallurgical and Materials Transactions