| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
BCC-FCC Interface Leading to Ni Precipitation under Irradiation in a FeNi Alloy |
| Author(s) |
Estelle Meslin, Lisa Belkacémi, Brigitte Décamps, Marie Loyer-Prost, Maylise Nastar |
| On-Site Speaker (Planned) |
Estelle Meslin |
| Abstract Scope |
A bcc Fe-3%at. Ni ferritic alloy has been irradiated with 27 MeV Fe9+ ions at 673 K to a damage rate of 10-6 dpa.s-1 within the Jannus Saclay facility, up to a displacement damage of 1.2 dpa. We recently report the formation of a fcc phase in this purely bcc matrix [1]. Since the alloy was initially undersaturated, the out-of-equilibrium fcc phase formation was radiation induced. In this presentation, we will focus on the atomic scale description of the fcc/bcc interface (HR-TEM). There is a Kurdjumov-Sachs (KS) relationships: {111}γ(fcc)//{110}α(bcc) between the bcc matrix and the fcc precipitate. The later are grouped by blocks of 2 variants exhibiting a twin relationships. Explanations about the formation mechanism of these precipitates, involving the defects created under irradiation, will be given.
[1] L.T. Belkacemi, E. Meslin, B. Décamps, B. Radiguet, J. Henry, Acta Materialia Vol. 161 (2018)) 61-72. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |