Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging
The microstructure evolution and mechanical properties of VVER 1000 RPV steel Cr–Ni–Mo–V after accelerated thermal aging at 480 °C for varying durations were thoroughly examined. It was revealed that the diminishing trend in tensile strength, impact energy and microhardness decreased as the aging pe...
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| 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/S2238785424030461 |
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| author | Tengfei Wang Junkang Gao Shaohong Li Jun Li Junwan Li Hengyong Bu Huarong Qi Zhimin Li Mengnie Li |
| author_facet | Tengfei Wang Junkang Gao Shaohong Li Jun Li Junwan Li Hengyong Bu Huarong Qi Zhimin Li Mengnie Li |
| author_sort | Tengfei Wang |
| collection | DOAJ |
| description | The microstructure evolution and mechanical properties of VVER 1000 RPV steel Cr–Ni–Mo–V after accelerated thermal aging at 480 °C for varying durations were thoroughly examined. It was revealed that the diminishing trend in tensile strength, impact energy and microhardness decreased as the aging period extended. The microstructure was meticulously characterized using optical microscopy, scanning electron microscopy, and transmission electron microscopy. It was found that with the prolongation of thermal aging time, the carbides were coarsened and transformed, and the large-sized carbides were redissolved into the matrix after a certain period of thermal aging. The increasing presence of M23C6 carbides over the duration of thermal aging indicated a transition from MC to M23C6, highlighting that the primary cause of property degradation during thermal aging was the coarsening of carbides. |
| format | Article |
| id | doaj-art-0b839198d9b749288539c85cd082b5b0 |
| 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-0b839198d9b749288539c85cd082b5b02025-01-19T06:25:56ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013427402753Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal agingTengfei Wang0Junkang Gao1Shaohong Li2Jun Li3Junwan Li4Hengyong Bu5Huarong Qi6Zhimin Li7Mengnie Li8Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Metals, Kunming, Yunnan, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Metals, Kunming, Yunnan, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Metals, Kunming, Yunnan, China; Corresponding author. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China.Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Metals, Kunming, Yunnan, ChinaSchool of Materials Science and Engineering, Shanghai University, Shanghai, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Metals, Kunming, Yunnan, ChinaFaculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Metals, Kunming, Yunnan, ChinaYunnan College of Business Management, Kunming, Yunnan, China; Corresponding author. Yunnan College of Business Management, Kunming, Yunnan, China.Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China; Yunnan Key Laboratory of Integrated Computational Materials Engineering for Advanced Light Metals, Kunming, Yunnan, China; Corresponding author. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan, China.The microstructure evolution and mechanical properties of VVER 1000 RPV steel Cr–Ni–Mo–V after accelerated thermal aging at 480 °C for varying durations were thoroughly examined. It was revealed that the diminishing trend in tensile strength, impact energy and microhardness decreased as the aging period extended. The microstructure was meticulously characterized using optical microscopy, scanning electron microscopy, and transmission electron microscopy. It was found that with the prolongation of thermal aging time, the carbides were coarsened and transformed, and the large-sized carbides were redissolved into the matrix after a certain period of thermal aging. The increasing presence of M23C6 carbides over the duration of thermal aging indicated a transition from MC to M23C6, highlighting that the primary cause of property degradation during thermal aging was the coarsening of carbides.http://www.sciencedirect.com/science/article/pii/S2238785424030461RPV steelThermal agingMicrostructure evolutionCarbide coarsening |
| spellingShingle | Tengfei Wang Junkang Gao Shaohong Li Jun Li Junwan Li Hengyong Bu Huarong Qi Zhimin Li Mengnie Li Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging Journal of Materials Research and Technology RPV steel Thermal aging Microstructure evolution Carbide coarsening |
| title | Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging |
| title_full | Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging |
| title_fullStr | Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging |
| title_full_unstemmed | Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging |
| title_short | Microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging |
| title_sort | microstructure evolution and mechanical properties degradation behavior of nuclear power pressure vessel steel induced by prolonged thermal aging |
| topic | RPV steel Thermal aging Microstructure evolution Carbide coarsening |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424030461 |
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