We show 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 1 MeV Kr++ irradiations on Cu with nanovoids in a transmission electron microscope up to 350 °C. 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, and the remaining large faceted nanovoids. The underlying mechanisms of irradiation-induced void spheroidization and shrinkage were discussed based on phase-field modeling.
Fan, Cuncai, et al. "Irradiation induced void spheroidization, shrinkage and migration in Cu at elevated temperatures: An <em>in situ</em> study." Acta Materialia, vol. 201, Oct. 2020. https://doi.org/10.1016/j.actamat.2020.10.008
Fan, Cuncai, Annadanam, Rayaprolu Sreekar, Shang, Zhongxia, et al., "Irradiation induced void spheroidization, shrinkage and migration in Cu at elevated temperatures: An <em>in situ</em> study," Acta Materialia 201 (2020), https://doi.org/10.1016/j.actamat.2020.10.008
@article{osti_1864285,
author = {Fan, Cuncai and Annadanam, Rayaprolu Sreekar and Shang, Zhongxia and Li, Jin and Li, Meimei and Wang, Haiyan and El-Azab, Anter and Zhang, Xinghang},
title = {Irradiation induced void spheroidization, shrinkage and migration in Cu at elevated temperatures: An <em>in situ</em> study},
annote = {We show 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 1 MeV Kr++ irradiations on Cu with nanovoids in a transmission electron microscope up to 350 °C. 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, and the remaining large faceted nanovoids. The underlying mechanisms of irradiation-induced void spheroidization and shrinkage were discussed based on phase-field modeling.},
doi = {10.1016/j.actamat.2020.10.008},
url = {https://www.osti.gov/biblio/1864285},
journal = {Acta Materialia},
issn = {ISSN 1359-6454},
volume = {201},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {10}}
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 228, Issue 1-4https://doi.org/10.1016/j.nimb.2004.10.043
Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12https://doi.org/10.1016/j.nimb.2010.02.091