About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additively Manufactured Materials for Nuclear Energy
|
| Presentation Title |
Mesoscale Modeling of Radiation Damage Evolution in Additively Manufactured Austenitic Stainless Steel |
| Author(s) |
Sourabh Bhagwan Kadambi, Wei-Ying Chen, Stephen Taller, Mathew Swisher, Jia-Hong Ke |
| On-Site Speaker (Planned) |
Sourabh Bhagwan Kadambi |
| Abstract Scope |
Additive manufacturing produces dislocation cell structures in austenitic stainless steels that are expected to alter radiation damage response under irradiation relative to conventionally manufactured materials. We employ mesoscale modeling and simulation to investigate radiation damage evolution within these spatially heterogeneous microstructures to examine how dislocation density within cell interiors and cell walls influences defect and void evolution. We investigate the role of radiation-induced segregation at dislocation cell walls and void surfaces in modifying local defect fluxes and void evolution, as well as the effect of carbon on defect evolution. Model parameters are informed by atomistic simulations, and predictions are compared against ion irradiation data on LPBF 316 SS across relevant temperatures, dose, and carbon content. This talk provides mechanistic understanding of how additively manufactured microstructural features govern radiation-induced microstructure evolution in nuclear structural materials. |