He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy Alloys
High-entropy alloys (HEAs) have shown promising potential applications in advanced reactors due to the outstanding mechanical properties and irradiation tolerance at elevated temperatures. In this work, the novel low-activation Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5<...
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| author | Huanzhi Zhang Qianqian Wang Chunhui Li Zhenbo Zhu Hefei Huang Yiping Lu |
| author_facet | Huanzhi Zhang Qianqian Wang Chunhui Li Zhenbo Zhu Hefei Huang Yiping Lu |
| author_sort | Huanzhi Zhang |
| collection | DOAJ |
| description | High-entropy alloys (HEAs) have shown promising potential applications in advanced reactors due to the outstanding mechanical properties and irradiation tolerance at elevated temperatures. In this work, the novel low-activation Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs were designed and prepared to explore high-performance HEAs under irradiation. The microstructures and mechanical properties of the Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs before and after irradiation were investigated. The results showed that the unirradiated Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs displayed a single-phase BCC structure. The yield strength of the Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs increased gradually with the increase of Hf content without decreasing the plasticity at room and elevated temperatures. After irradiation, no obvious radiation-induced segregations or precipitations were found in the transmission electron microscope results of the representative Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA. The size and number density of the He bubbles in the Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA increased with the improvement of fluence at 1023 K. At the fluences of 1 × 10<sup>16</sup> and 3 × 10<sup>16</sup> ions/cm<sup>2</sup>, the irradiation hardening fractions of the Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA were 17.7% and 34.1%, respectively, which were lower than those of most reported conventional low-activation materials at similar He ion irradiation fluences. The Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA showed good comprehensive mechanical properties, structural stability, and irradiation hardening resistance at elevated temperatures, making it a promising structural material candidate for advanced nuclear energy systems. |
| first_indexed | 2024-03-10T23:46:38Z |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T23:46:38Z |
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| spelling | doaj.art-8bed5ad566fd4f4eae7b834a775237652023-11-19T01:58:50ZengMDPI AGMaterials1996-19442023-08-011616553010.3390/ma16165530He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy AlloysHuanzhi Zhang0Qianqian Wang1Chunhui Li2Zhenbo Zhu3Hefei Huang4Yiping Lu5Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, ChinaKey Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaShanghai Institute of Applied Physics, Chinese Academy of Sciences (CAS), Shanghai 201800, ChinaKey Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, ChinaHigh-entropy alloys (HEAs) have shown promising potential applications in advanced reactors due to the outstanding mechanical properties and irradiation tolerance at elevated temperatures. In this work, the novel low-activation Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs were designed and prepared to explore high-performance HEAs under irradiation. The microstructures and mechanical properties of the Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs before and after irradiation were investigated. The results showed that the unirradiated Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs displayed a single-phase BCC structure. The yield strength of the Ti<sub>2</sub>ZrHf<sub>x</sub>V<sub>0.5</sub>Ta<sub>0.2</sub> HEAs increased gradually with the increase of Hf content without decreasing the plasticity at room and elevated temperatures. After irradiation, no obvious radiation-induced segregations or precipitations were found in the transmission electron microscope results of the representative Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA. The size and number density of the He bubbles in the Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA increased with the improvement of fluence at 1023 K. At the fluences of 1 × 10<sup>16</sup> and 3 × 10<sup>16</sup> ions/cm<sup>2</sup>, the irradiation hardening fractions of the Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA were 17.7% and 34.1%, respectively, which were lower than those of most reported conventional low-activation materials at similar He ion irradiation fluences. The Ti<sub>2</sub>ZrHfV<sub>0.5</sub>Ta<sub>0.2</sub> HEA showed good comprehensive mechanical properties, structural stability, and irradiation hardening resistance at elevated temperatures, making it a promising structural material candidate for advanced nuclear energy systems.https://www.mdpi.com/1996-1944/16/16/5530high-entropy alloysmechanical propertieshelium bubblesirradiation tolerancelow-activation materials |
| spellingShingle | Huanzhi Zhang Qianqian Wang Chunhui Li Zhenbo Zhu Hefei Huang Yiping Lu He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy Alloys Materials high-entropy alloys mechanical properties helium bubbles irradiation tolerance low-activation materials |
| title | He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy Alloys |
| title_full | He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy Alloys |
| title_fullStr | He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy Alloys |
| title_full_unstemmed | He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy Alloys |
| title_short | He-ion Irradiation Effects on the Microstructures and Mechanical Properties of the Ti-Zr-Hf-V-Ta Low-Activation High-Entropy Alloys |
| title_sort | he ion irradiation effects on the microstructures and mechanical properties of the ti zr hf v ta low activation high entropy alloys |
| topic | high-entropy alloys mechanical properties helium bubbles irradiation tolerance low-activation materials |
| url | https://www.mdpi.com/1996-1944/16/16/5530 |
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