| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Elucidating Microstructural Evolution Under Extreme Environments
|
| Presentation Title |
Embrittlement and Hardening of Beryllium Under Irradiation at Low Temperatures |
| Author(s) |
Viacheslav Kuksenko |
| On-Site Speaker (Planned) |
Viacheslav Kuksenko |
| Abstract Scope |
A set of micromechanical and microstructural studies was carried out on beryllium samples irradiated by high energy protons and on samples implanted in an ion accelerator with He ions. Irradiation at 50°C to a dose of 0.04 dpa (160 appm of He) led to fracture mode change from transgranular cleavage to grain-boundary cracking. After irradiation, microcantilevers fracture tests showed significant increase of fracture load with almost complete loss of ductility. Nanoindentation tests demonstrated that irradiation induced hardening after 50°C implantation is about 2 times higher than after 200°C (0.1dpa, 2000appm of He). Analysis demonstrated that the “black dots” should lead to about half of the measured hardness increase, while the rest of the hardening should originate from helium bubbles with the size below the TEM resolution. The possible mechanisms of the described behaviours are analysed in combination with the observed microstructural changes obtained by SEM, APT and Raman microscopy investigations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, |