TY - JOUR
T1 - Void shrinkage in 21Cr32Ni austenitic model alloy during in-situ ion irradiation
AU - Ayanoglu, M.
AU - Motta, A. T.
N1 - Funding Information:
This work was supported by a DOE NEUP Integrated Research Project (IRP) by the U.S. Department of Energy under award number DE-NE0000639. We thank our collaborators at the Michigan Ion Beam Laboratory, Stephen Taller and Gary Was for the bulk sample irradiations. The authors would also like to thank Mark Kirk, Meimei Li, Ed Ryan, and Pete Baldo for their assistance on carrying out the in-situ ion irradiation experiments, and Djamel Kaoumi for his valuable comments.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/1
Y1 - 2021/1
N2 - Austenitic 21Cr32Ni model alloy thin foils, previously irradiated with 5 MeV Fe++ ions in bulk to create voids, were re-irradiated in-situ in the Intermediate Voltage Electron Microscope Facility (IVEM). The voids which had been formed under bulk-ion irradiation shrank and disappeared after in-situ Kr ion irradiation in the temperature range 50 K-713 K to an additional dose of 1 dpa. The voids were unaffected by eithersuccessive thermal annealing to 673 K and by prolonged exposure to the 200 keV electron beam at the irradiation temperature. The high void shrinkage rate observed did not change significantly for irradiation temperatures between 50 K and 713 K, suggesting that the void shrinkage process in thin foils during in-situ heavy-ion irradiation results from the interactions of displacement cascades with the voids. Possible void shrinkage mechanisms under thin foil irradiation are discussed in this study.
AB - Austenitic 21Cr32Ni model alloy thin foils, previously irradiated with 5 MeV Fe++ ions in bulk to create voids, were re-irradiated in-situ in the Intermediate Voltage Electron Microscope Facility (IVEM). The voids which had been formed under bulk-ion irradiation shrank and disappeared after in-situ Kr ion irradiation in the temperature range 50 K-713 K to an additional dose of 1 dpa. The voids were unaffected by eithersuccessive thermal annealing to 673 K and by prolonged exposure to the 200 keV electron beam at the irradiation temperature. The high void shrinkage rate observed did not change significantly for irradiation temperatures between 50 K and 713 K, suggesting that the void shrinkage process in thin foils during in-situ heavy-ion irradiation results from the interactions of displacement cascades with the voids. Possible void shrinkage mechanisms under thin foil irradiation are discussed in this study.
UR - http://www.scopus.com/inward/record.url?scp=85095427873&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85095427873&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2020.152636
DO - 10.1016/j.jnucmat.2020.152636
M3 - Article
AN - SCOPUS:85095427873
VL - 543
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
SN - 0022-3115
M1 - 152636
ER -