| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Radiation Effects in Metals and Ceramics
|
| Presentation Title |
H-39: Doppler Broadening Positron Annihilation Spectroscopy for Understanding Void Formation in Neutron Irradiated Fe-Cr Alloys |
| Author(s) |
Carly J. Romnes, Ming Liu, James Stubbins |
| On-Site Speaker (Planned) |
Carly J. Romnes |
| Abstract Scope |
Positron annihilation spectroscopy (PAS) is a powerful, non-destructive technique used to characterize the defect properties of materials. This work focused on a type of PAS called Doppler Broadening Spectroscopy (DBS). Several samples were irradiated at a wide range of conditions at the Advanced Test Reactor at Idaho National Laboratory. DBS was utilized to better understand materials exposed to low doses at irradiation temperatures of 300°C, 450°C, and 550°C. The goal of this work is to develop a fundamental understanding of the evolution of nanoscale and sub-nanoscale defect clusters in neutron irradiated Fe-Cr alloys. These defect clusters are too small to identify using other experimental microstructural analysis techniques, such as high-resolution transmission electron microscopy, and are not stable enough to identify using atom probe tomography, which makes PAS an ideal technique for this work. PAS is essential for developing a fundamental understanding of void nucleation and void incubation processes. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |