A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation Characterization
In fossil fuel and nuclear power plants, welded joints continuously experience creep-fatigue loading, which can result in premature cracking during the in-service term. To study the creep-fatigue interactive (CFI) behavior, the CFI test of P92 steel was performed with different strain rates at 823 K...
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MDPI AG
2025-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/15/1/53 |
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| author | Zhangmin Jin Zhihui Cai Xuecheng Gu Zhiqiang Wang Yiwen Han Ting Yu Yuxuan Song Zengliang Gao Zhongrui Zheng |
| author_facet | Zhangmin Jin Zhihui Cai Xuecheng Gu Zhiqiang Wang Yiwen Han Ting Yu Yuxuan Song Zengliang Gao Zhongrui Zheng |
| author_sort | Zhangmin Jin |
| collection | DOAJ |
| description | In fossil fuel and nuclear power plants, welded joints continuously experience creep-fatigue loading, which can result in premature cracking during the in-service term. To study the creep-fatigue interactive (CFI) behavior, the CFI test of P92 steel was performed with different strain rates at 823 K. Results indicate that the short cycle life is measured with the increasing strain rate. Relying on the scanning electron microscope, the fracture mechanism of P92 steel gradually changes from fatigue-dominating to creep-fatigue interactive damage with the increasing strain rate. The hardness (H), elastic modulus (E) and creep deformation were then measured by nanoindentation, and the strain rate sensitivity (m) was estimated. The relation between the degenerated mechanical properties and microstructural evaluations, i.e., enhanced grain size and nucleation of creep voids, was established, and the damage mechanism was discussed. |
| format | Article |
| id | doaj-art-26cb3ec93a9a4cbf805f5722be1987a6 |
| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj-art-26cb3ec93a9a4cbf805f5722be1987a62025-01-24T13:41:32ZengMDPI AGMetals2075-47012025-01-011515310.3390/met15010053A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation CharacterizationZhangmin Jin0Zhihui Cai1Xuecheng Gu2Zhiqiang Wang3Yiwen Han4Ting Yu5Yuxuan Song6Zengliang Gao7Zhongrui Zheng8Wenzhou Special Equipment Inspection & Science Research Institute, Wenzhou 325800, ChinaWenzhou Special Equipment Inspection & Science Research Institute, Wenzhou 325800, ChinaHangzhou Steam Turbine Power Group Co., Ltd., Hangzhou 310012, ChinaInstitute of Process Equipment and Control Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaInstitute of Process Equipment and Control Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaInstitute of Process Equipment and Control Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaInstitute of Process Equipment and Control Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaInstitute of Process Equipment and Control Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, ChinaWenzhou Special Equipment Inspection & Science Research Institute, Wenzhou 325800, ChinaIn fossil fuel and nuclear power plants, welded joints continuously experience creep-fatigue loading, which can result in premature cracking during the in-service term. To study the creep-fatigue interactive (CFI) behavior, the CFI test of P92 steel was performed with different strain rates at 823 K. Results indicate that the short cycle life is measured with the increasing strain rate. Relying on the scanning electron microscope, the fracture mechanism of P92 steel gradually changes from fatigue-dominating to creep-fatigue interactive damage with the increasing strain rate. The hardness (H), elastic modulus (E) and creep deformation were then measured by nanoindentation, and the strain rate sensitivity (m) was estimated. The relation between the degenerated mechanical properties and microstructural evaluations, i.e., enhanced grain size and nucleation of creep voids, was established, and the damage mechanism was discussed.https://www.mdpi.com/2075-4701/15/1/53welded jointcreep-fatigue interactionstrain ratenanoindentation |
| spellingShingle | Zhangmin Jin Zhihui Cai Xuecheng Gu Zhiqiang Wang Yiwen Han Ting Yu Yuxuan Song Zengliang Gao Zhongrui Zheng A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation Characterization Metals welded joint creep-fatigue interaction strain rate nanoindentation |
| title | A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation Characterization |
| title_full | A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation Characterization |
| title_fullStr | A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation Characterization |
| title_full_unstemmed | A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation Characterization |
| title_short | A Study of the Creep-Fatigue Damage Mechanism of a P92 Welded Joint Using Nanoindentation Characterization |
| title_sort | study of the creep fatigue damage mechanism of a p92 welded joint using nanoindentation characterization |
| topic | welded joint creep-fatigue interaction strain rate nanoindentation |
| url | https://www.mdpi.com/2075-4701/15/1/53 |
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