About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Comparative Study on Irradiation Resistance of Additively Manufactured 316L Stainless Steel and CoCrFeNi High-Entropy Alloys |
| Author(s) |
Som Dixit, Yongqiang Wang, Shunyu Liu |
| On-Site Speaker (Planned) |
Shunyu Liu |
| Abstract Scope |
316L stainless steel (316L SS) and high-entropy alloys (HEAs) are among the leading candidates for radiation-tolerant structural materials. Additive manufacturing (AM) of these materials has gained significant attention due to its ability to refine and tailor microstructure through unique thermal histories. These microstructural modifications, such as high dislocation densities and sub-grain features, can act as effective sinks for radiation-induced defects. Therefore, this study presents a comparative analysis of the irradiation response of AM 316L SS and CoCrFeNi HEAs, both exhibiting a face-centered cubic (FCC) crystal structure. The samples were subjected to ex-situ helium ion irradiation at 400 °C using 200 keV He⁺ ions to a peak damage dose of 10 dpa at Los Alamos National Laboratory. Post-irradiation microstructural characterization was performed using high-resolution transmission electron microscopy. The size, number, and distribution of helium bubbles were analyzed and compared. Results highlight differences in defect tolerance and the potential of AM-fabricated FCC alloys. |