Effect of heavy ion irradiation on microstructural evolution in CF8 cast austenitic stainless steel
Abstract
The microstructural evolution in ferrite and austenitic in cast austenitic stainless steel (CASS) CF8, as received or thermally aged at 400 °C for 10,000 h, was followed under TEM with in situ irradiation of 1 MeV Kr ions at 300 and 350 °C to a fluence of 1.9 × 1015 ions/cm2 (~3 dpa) at the IVEM-Tandem Facility. For the unaged CF8, the irradiation-induced dislocation loops appeared at a much lower dose in the austenite than in the ferrite. At the end dose, the austenite formed a well-developed dislocation network microstructure, while the ferrite exhibited an extended dislocation structure as line segments. Compared to the unaged CF8, the aged specimen appeared to have lower rate of damage accumulation. The rate of microstructural evolution under irradiation in the ferrite was significantly lower in the aged specimen than in the unaged. Finally, we attributed this difference to the different initial microstructures in the unaged and aged specimens, which implies that thermal aging and irradiation are not independent but interconnected damage processes.
- Authors:
-
[1];
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Electric Power Research Inst., Palo Alto, CA (United States)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1339086
- Alternate Identifier(s):
- OSTI ID: 1252056
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Nuclear Materials
- Additional Journal Information:
- Journal Volume: 471; Journal Issue: C; Journal ID: ISSN 0022-3115
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; Aging; Austenite; CASS; Dislocation loops; Ferrite; Irradiation; Nuclear; Synergistic effect; TEM; G-phase; Cast austenitic stainless steel
Citation Formats
Chen, Wei-Ying, Li, Meimei, Kirk, Marquis A., Baldo, Peter M., and Lian, Tiangan. Effect of heavy ion irradiation on microstructural evolution in CF8 cast austenitic stainless steel. United States: N. p., 2015.
Web. doi:10.1016/j.jnucmat.2015.08.032.
Chen, Wei-Ying, Li, Meimei, Kirk, Marquis A., Baldo, Peter M., & Lian, Tiangan. Effect of heavy ion irradiation on microstructural evolution in CF8 cast austenitic stainless steel. United States. https://doi.org/10.1016/j.jnucmat.2015.08.032
Chen, Wei-Ying, Li, Meimei, Kirk, Marquis A., Baldo, Peter M., and Lian, Tiangan. Fri .
"Effect of heavy ion irradiation on microstructural evolution in CF8 cast austenitic stainless steel". United States. https://doi.org/10.1016/j.jnucmat.2015.08.032. https://www.osti.gov/servlets/purl/1339086.
@article{osti_1339086,
title = {Effect of heavy ion irradiation on microstructural evolution in CF8 cast austenitic stainless steel},
author = {Chen, Wei-Ying and Li, Meimei and Kirk, Marquis A. and Baldo, Peter M. and Lian, Tiangan},
abstractNote = {The microstructural evolution in ferrite and austenitic in cast austenitic stainless steel (CASS) CF8, as received or thermally aged at 400 °C for 10,000 h, was followed under TEM with in situ irradiation of 1 MeV Kr ions at 300 and 350 °C to a fluence of 1.9 × 1015 ions/cm2 (~3 dpa) at the IVEM-Tandem Facility. For the unaged CF8, the irradiation-induced dislocation loops appeared at a much lower dose in the austenite than in the ferrite. At the end dose, the austenite formed a well-developed dislocation network microstructure, while the ferrite exhibited an extended dislocation structure as line segments. Compared to the unaged CF8, the aged specimen appeared to have lower rate of damage accumulation. The rate of microstructural evolution under irradiation in the ferrite was significantly lower in the aged specimen than in the unaged. Finally, we attributed this difference to the different initial microstructures in the unaged and aged specimens, which implies that thermal aging and irradiation are not independent but interconnected damage processes.},
doi = {10.1016/j.jnucmat.2015.08.032},
journal = {Journal of Nuclear Materials},
number = C,
volume = 471,
place = {United States},
year = {Fri Aug 21 00:00:00 EDT 2015},
month = {Fri Aug 21 00:00:00 EDT 2015}
}
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