Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulation
The study examines the effects of high-level irradiation on the mechanical property changes and microstructural evolution of 316 stainless steel (SS) through a combination of nanoindentation tests and simulations. The irradiation conditions involve a targeted dose of approximately 200 displacements...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029739 |
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| author | Van-Thanh Pham Jong-Sung Kim Hyun Joon Eom Changheui Jang |
| author_facet | Van-Thanh Pham Jong-Sung Kim Hyun Joon Eom Changheui Jang |
| author_sort | Van-Thanh Pham |
| collection | DOAJ |
| description | The study examines the effects of high-level irradiation on the mechanical property changes and microstructural evolution of 316 stainless steel (SS) through a combination of nanoindentation tests and simulations. The irradiation conditions involve a targeted dose of approximately 200 displacements per atom (dpa) at 500 °C and transmission electron microscopy is employed to quantify void parameters (diameter, number density, and swelling) in irradiated specimen. Simulation models, based on strain-gradient crystal plasticity theory, are developed for unirradiated and irradiated states (151 dpa, 161 dpa, 200 dpa, 237 dpa, and 251 dpa), and successfully validated against nanoindentation test results. The simulation results indicate that the true bulk hardness of 316 SS exhibits a significant increase in high-level irradiation doses and is highly sensitive to void swelling. The irradiation enhances the yield stress of 316 SS while reducing its strain-hardening capacity. Additionally, higher irradiation doses or greater void swelling result in increased yield stress and reduced strain-hardening capabilities. The evolution of irradiation defect density beneath the indenter tip is attributed to the increasing annihilation of defects near the indenter tip. |
| format | Article |
| id | doaj-art-7660a098d01f499a8facc63caada0e71 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-7660a098d01f499a8facc63caada0e712025-01-19T06:25:42ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013417771790Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulationVan-Thanh Pham0Jong-Sung Kim1Hyun Joon Eom2Changheui Jang3Department of Quantum and Nuclear Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul, 05006, Republic of KoreaDepartment of Quantum and Nuclear Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul, 05006, Republic of Korea; Corresponding author.Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of KoreaDepartment of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of KoreaThe study examines the effects of high-level irradiation on the mechanical property changes and microstructural evolution of 316 stainless steel (SS) through a combination of nanoindentation tests and simulations. The irradiation conditions involve a targeted dose of approximately 200 displacements per atom (dpa) at 500 °C and transmission electron microscopy is employed to quantify void parameters (diameter, number density, and swelling) in irradiated specimen. Simulation models, based on strain-gradient crystal plasticity theory, are developed for unirradiated and irradiated states (151 dpa, 161 dpa, 200 dpa, 237 dpa, and 251 dpa), and successfully validated against nanoindentation test results. The simulation results indicate that the true bulk hardness of 316 SS exhibits a significant increase in high-level irradiation doses and is highly sensitive to void swelling. The irradiation enhances the yield stress of 316 SS while reducing its strain-hardening capacity. Additionally, higher irradiation doses or greater void swelling result in increased yield stress and reduced strain-hardening capabilities. The evolution of irradiation defect density beneath the indenter tip is attributed to the increasing annihilation of defects near the indenter tip.http://www.sciencedirect.com/science/article/pii/S2238785424029739Mechanical characterization316 SSIon-irradiationNanoindentationAustenitic stainless steel |
| spellingShingle | Van-Thanh Pham Jong-Sung Kim Hyun Joon Eom Changheui Jang Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulation Journal of Materials Research and Technology Mechanical characterization 316 SS Ion-irradiation Nanoindentation Austenitic stainless steel |
| title | Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulation |
| title_full | Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulation |
| title_fullStr | Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulation |
| title_full_unstemmed | Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulation |
| title_short | Mechanical characterization of austenitic stainless steel under high-level ion-irradiation using nanoindentation experiment and simulation |
| title_sort | mechanical characterization of austenitic stainless steel under high level ion irradiation using nanoindentation experiment and simulation |
| topic | Mechanical characterization 316 SS Ion-irradiation Nanoindentation Austenitic stainless steel |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029739 |
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