About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
|
| Presentation Title |
Influence of Compositional and Microstructural Complexity on Ion Irradiation Resistance in Additively Manufactured CoCrFeNi-based High-Entropy Alloys |
| Author(s) |
Jiaxuan Li, Som Dixit, Yongqiang Wang, Shunyu Liu |
| On-Site Speaker (Planned) |
Shunyu Liu |
| Abstract Scope |
To investigate the influence of elemental composition and microstructural complexity on ion irradiation damage mechanisms in CoCrFeNi-based high-entropy alloys, equiatomic CoCrFeNi, CoCrFeNiMn, and CoCrFeNiMo alloys were fabricated via laser-directed energy deposition and irradiated with 200 keV He⁺ ions to a peak dose of 10 dpa under high temperatures at Los Alamos National Laboratory. The irradiation-induced defect distributions, morphologies, elemental segregation, and microstructural evolution were systematically characterized using transmission electron microscopy and high-resolution scanning electron microscopy. Furthermore, nanoindentation testing was employed to evaluate irradiation-induced changes in micromechanical properties. These findings underscore the intricate interplay between alloying elements and defect evolution under ion irradiation in high-entropy alloys, offering valuable insights for the composition-driven design of radiation-tolerant materials for nuclear engineering. |