| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
Effects of Chemical Complexity and Radiation Parameters on Defect Evolution in Nickel-based Concentrated Solid Solution Alloys |
| Author(s) |
Pengyuan Xiu, Li Jiang, Yanwen Zhang, Lumin Wang |
| On-Site Speaker (Planned) |
Pengyuan Xiu |
| Abstract Scope |
Nickel based single-phase concentrated solid solution alloys (SP-CSA), Ni-20Fe, Ni-50Fe and NiFe-20Cr, were irradiated with 3 MeV Ni2+ ions to peak doses of 3, 16, 86 and 250 dpa at 500℃ and 580℃. High density of dislocation loops formed in three alloys under all radiation conditions, while a significant amount of Frank loops was observed only after low doses (3 dpa and 16 dpa) at 500℃. The chemically more complex NiFe-20Cr contains a higher fraction of Frank loops indicating a lower stacking fault energy compared to that of the two binary alloys. While void swelling decreases with increasing chemical complexity from Ni-20Fe to NiFe-20Cr after 250 dpa at 500℃, the trend is reversed at 580℃. Nano-indentation tests are also conducted to reveal the correlation between microstructure evolution and irradiation hardening. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |