| About this Abstract |
| Meeting |
2016 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
|
| Presentation Title |
Y-7: Reexamination of the “Temperature-shift” Arising from Increases in dpa-rate during Ion Bombardment |
| Author(s) |
Frank A. Garner, Alexander S. Kalchenko, Michael P. Short, Lin Shao, Stuart A. Maloy |
| On-Site Speaker (Planned) |
Frank A. Garner |
| Abstract Scope |
The temperature regime of ion-induced swelling shifts upward with increasing dpa-rate, with swelling tending to decrease at higher rates. This shift has never been demonstrated in a neutron environment for iron-base alloys, where increases in dpa-rate increase the transient duration, but do not affect the steady-state swelling rate. While there exists a well-established temperature-shift formalism, it does not account for the effect of specimen surfaces or the strong effects of injected-interstitials. More importantly, the data supporting a temperature-shift were derived prior to full knowledge of the injected-interstitial power. It is now known that both the surface effect and the injected-interstitial effect are very strong determinants of the temperature regime of swelling and that void nucleation is strongly affected by dpa-rate such that these two effects alone can produce a temperature-shift. The historical data defining the temperature-shift are reexamined to show that they were strongly affected by surface and injected-interstitial influences. |
| Proceedings Inclusion? |
Planned: A print-only volume |