b'Assessment of NeutronFundamental understanding of irradiation response of semi-coherent interfaces Irradiation Toleranceprovides insights into the design and creation of irradiation-resistant materials.of Semi-coherentT he objective of this research was to elucidate the role of semi-coherent nano-lamellar structures on the defect evolution and phase stability of Nano-lamellarStructures intermetallic titanium aluminides under irradiation, with the long-term objective of applying this understanding to design irradiation tolerant materials for advanced nuclear energy systems. In nuclear reactors, irradiation damage significantly degrades the microstructure and mechanical properties of materials, which limits the lifetime of nuclear core components in service. The development of advanced materials that are immune to irradiation damage is one of the TOTAL APPROVED AMOUNT:great challenges in the design of advanced nuclear reactors. In this project, we $120,000 over 1 year studied the irradiation damage of semi-coherent lamellar structures in titanium PROJECT NUMBER:aluminides under irradiation and demonstrated an approach to enhance the 20A1054-017 irradiation tolerance of materials via nano-engineering. The success of this project will stimulate broader research interest in the design of irradiation-tolerant PRINCIPAL INVESTIGATOR:materials for harsh environments.Cheng SunTALENT PIPELINE:CO-INVESTIGATORS: Haowei Xu, student at Massachusetts Institute of TechnologyBoopathy Kombaiah, INLJu Li, Massachusetts Institute of TechnologyCOLLABORATORS:Center for Materials Elaboration and Structural StudiesMassachusetts Institute of TechnologyPlanar faults formed in the vicinity of faceted helium gas bubbles in titanium aluminides. The image on the right is a 10x zoom to magnify the planar faults.49'