|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Seeing is Believing -- Understanding Environmental Degradation and Mechanical Response Using Advanced Characterization Techniques: An SMD Symposium in Honor of Ian M. Robertson
||In Situ TEM Studies on the Radiation Response of Cu with Nanovoids
||Cuncai Fan , Rayaprolu Goutham Sreekar Annadanam , Zhongxia Shang , Meimei Li, Anter El-Azab, Xinghang Zhang
|On-Site Speaker (Planned)
Understanding the void evolution in irradiation environment is of great interest and significance, as irradiation-induced voids typically lead to pronounced volumetric swelling and degradation of mechanical properties. In situ studies on the irradiation response of nanovoids at elevated temperature remain limited. In this work, we performed systematic in situ Kr ion irradiations on Cu with nanovoids in a transmission electron microscope up to 350 ℃. The in situ studies revealed intriguing void spheroidization, shrinkage and migration. Furthermore, the morphology evolution and migration of nanovoids showed a strong dependence on irradiation temperature and initial void size. Post-irradiation analyses identified defect clusters in the form of stacking fault tetrahedrons (SFTs), and the remaining large faceted nanovoids. The underlying mechanisms of irradiation-induced void spheroidization and shrinkage were discussed based on phase-field modeling.
||Nuclear Materials, Characterization,