|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Quantifying Radiation Damage in Materials Using Stored Energy Fingerprints
||Charles Hirst, Rachel Connick, Logan Abel, Sean Lowder, Ki-Jana Carter, Kangpyo So, Penghui Cao, Michael Short
|On-Site Speaker (Planned)
As a unit of long-term radiation damage, the dpa is fundamentally flawed. We propose a novel method to determine the remaining defect population in a material after irradiation by measuring the stored “Wigner” energy. Samples are prepared using FIB lift out from ion-irradiated pure metal foils. Fast Scanning Differential Calorimetry (FDSC) is used to heat the samples to 450C four times. Defects anneal out during the first run, releasing their stored energy. Subsequent runs of the annealed sample are subtracted as a baseline. Studies measuring the stored energy as a function of dose and dose rate will be conducted for Al and Cu. Experiments will be compared to molecular dynamics simulations and TEM characterisation to determine the type, size, and number of defects present in the material. This will give insight into the mechanisms behind radiation damage evolution and will thus inform predictions of material properties over time.
||Planned: Supplemental Proceedings volume