|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Effect of Irradiation Dose Rate on Precipitation in Fe-Cu and Fe-Cu-Mn Model Alloys
||Shipeng Shu, Nathan Almirall, Dane D. Morgan, Scott Tumey, Brian D. Wirth, G. Robert Odette
|On-Site Speaker (Planned)
Irradiation induced/enhanced precipitation can cause significant embrittlement in structural materials in nuclear reactors. Many factors, including metallurgical variables and irradiation parameters, can affect this process. To better understand experiments carried out using various accelerated irradiations, it is important to investigate the effect of the wide range of dose rates by taking into account the dominating mechanisms in each condition. Using techniques such as APT and SANS, we study the dose rate effect on the precipitation process in Fe-Cu and Fe-Cu-Mn model alloys. Differences observed in the precipitation processes were rationalized by considering both the effect of radiation enhanced diffusion (RED) and irradiation forced chemical mixing. We show that the precipitation size evolution in the ion irradiated samples are significantly affected by the forced mixing, and that the evolution trend can be understood by considering the competition between RED and forced mixing.
||Planned: Supplemental Proceedings volume