|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Environmental Degradation of Additively Manufactured Alloys
|The Process-Structure-Performance Correlations of Additively Manufactured Steels Exposed to High Dose Neutron Irradiations
|Kevin Field, Pengyuan Xiu, Niyanth Sridharan
|On-Site Speaker (Planned)
Additive manufacturing (AM) including directed energy deposition (DED) methods are being considered for production of nuclear reactor components. Here, the process-structure-performance (p-s-p) paradigm will be discussed for nuclear grade steels produced via DED-based AM technologies and exposed to high dose (e.g., ≥50 displacements per atom – dpa) ion irradiations. Specifically, the role of impurity contributions due to the AM process on radiation-enhanced clustering, the influence of post-build heat treatments on the swelling response, and the influence of co-injected helium on the loop formation and swelling in DED produced HT9 is considered. The conditions studied includes damages up to 250 dpa at 445°C, and irradiation temperatures from 400°C to 480°C at 50 dpa. It will be shown that the p-s-p relationship in AM HT9 is highly sensitive to minor changes within the p-s-p factors, thus highlighting the additional complexities in considering high dose degradation phenomena in AM produced steels.
|Additive Manufacturing, Nuclear Materials, Characterization