Zhongwen Yao1
Queen's University1
Understanding the impact of irradiation on the microstructure of zirconium alloys is critical for ensuring the safety and reliability of nuclear reactors. In this presentation, we applied in-situ transmission electron microscopy (TEM) as a powerful tool to unravel the dynamic evolution of zirconium alloy microstructures during irradiation or after irradiation.<br/>Through real-time TEM/STEM imaging, we explore the intricate processes taking place within zirconium alloys, such as Excel alloy, Zr-2.5Nb and Zircaloy as they are subjected to ion irradiation. We observe and analyze the complicated changes in microstructure, including a-type and c-type dislocation formation, defect accumulation, and phase transformations. These microstructural changes have a direct bearing on the material's mechanical properties and dimensional stability, making this research crucial for the nuclear industry.<br/>This presentation highlights the invaluable contribution of in-situ TEM techniques in providing real-time, atomic-scale observations of zirconium alloy behavior during irradiation, paving the way for enhanced material design and reactor safety.