Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture life
The formation mechanism of the two fracture behaviors and their effects on the creep life of P91 steel welded joints during creep were investigated, and the morphology and microstructure of the two fractures were characterized by SEM and EBSD, and the results were as follows: the change of fracture...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424024840 |
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| author | Denghui Wang Fei Gao Fulai Yang Kai Yan Zheng Zhang |
| author_facet | Denghui Wang Fei Gao Fulai Yang Kai Yan Zheng Zhang |
| author_sort | Denghui Wang |
| collection | DOAJ |
| description | The formation mechanism of the two fracture behaviors and their effects on the creep life of P91 steel welded joints during creep were investigated, and the morphology and microstructure of the two fractures were characterized by SEM and EBSD, and the results were as follows: the change of fracture modes was affected by the creep strain rate and cavity nucleation rate in the joint. When the applied stress is large, the creep strain rate of BM is higher, and brittle fracture occurs at BM; when the applied stress is low, the cavity nucleation rate of FGHAZ is higher, and brittle fracture occurs at FGHAZ, known as type IV cracking. The occurrence of type IV cracking will reduce the accuracy of creep life prediction methods, and life prediction considering fracture mode can effectively improve the prediction accuracy. |
| format | Article |
| id | doaj-art-c819071d357843818b8a57cbfde226f9 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-c819071d357843818b8a57cbfde226f92024-12-26T08:55:00ZengElsevierJournal of Materials Research and Technology2238-78542024-11-013363746388Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture lifeDenghui Wang0Fei Gao1Fulai Yang2Kai Yan3Zheng Zhang4School of Materials Science and Engineering, Beihang University, Beijing, 100191, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing, 100191, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing, 100191, ChinaChina Special Equipment Inspection & Research Institute, Beijing, 100029, ChinaSchool of Materials Science and Engineering, Beihang University, Beijing, 100191, China; Corresponding author.The formation mechanism of the two fracture behaviors and their effects on the creep life of P91 steel welded joints during creep were investigated, and the morphology and microstructure of the two fractures were characterized by SEM and EBSD, and the results were as follows: the change of fracture modes was affected by the creep strain rate and cavity nucleation rate in the joint. When the applied stress is large, the creep strain rate of BM is higher, and brittle fracture occurs at BM; when the applied stress is low, the cavity nucleation rate of FGHAZ is higher, and brittle fracture occurs at FGHAZ, known as type IV cracking. The occurrence of type IV cracking will reduce the accuracy of creep life prediction methods, and life prediction considering fracture mode can effectively improve the prediction accuracy.http://www.sciencedirect.com/science/article/pii/S2238785424024840P91 steel welded jointType IV crackingFracture mechanismLong-term creepCreep life prediction |
| spellingShingle | Denghui Wang Fei Gao Fulai Yang Kai Yan Zheng Zhang Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture life Journal of Materials Research and Technology P91 steel welded joint Type IV cracking Fracture mechanism Long-term creep Creep life prediction |
| title | Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture life |
| title_full | Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture life |
| title_fullStr | Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture life |
| title_full_unstemmed | Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture life |
| title_short | Effect of creep fracture mode transition of P91 steel welded joints on long-term creep fracture life |
| title_sort | effect of creep fracture mode transition of p91 steel welded joints on long term creep fracture life |
| topic | P91 steel welded joint Type IV cracking Fracture mechanism Long-term creep Creep life prediction |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424024840 |
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