The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel
The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel thick plates were investigated in the present work. The results showed that fusion zone microstructure consisted of austenite matrix and vermicular ferrite. Aging treatment promoted the decomposit...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422014727 |
| _version_ | 1798006087188742144 |
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| author | Chen Cui Kaixuan Gu Yinan Qiu Zeju Weng Mingli Zhang Junjie Wang |
| author_facet | Chen Cui Kaixuan Gu Yinan Qiu Zeju Weng Mingli Zhang Junjie Wang |
| author_sort | Chen Cui |
| collection | DOAJ |
| description | The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel thick plates were investigated in the present work. The results showed that fusion zone microstructure consisted of austenite matrix and vermicular ferrite. Aging treatment promoted the decomposition of δ-ferrite into σ-ferrites as well as the precipitation of carbides. Isothermal martensitic transformation in the Tungsten Inert Gas Welding (TIG) specimen was induced by cryogenic treatment, and stacking faults were increased. The fusion zone microstructure of Electron Beam Welding (EBW) and Laser Welding (LW) was finer than that of TIG, with acicular ferrite distributed in the austenite matrix. A large number of twins were generated in the austenite matrix after LW. Cryogenic treatment produced a large number of sub-grains in LW specimens, which was due to the entanglement and accumulation of dislocations in the vicinity of ferrite. Post-weld aging and cryogenic treatment have no influence on the strength of weldments with different welding methods while cryogenic treatment could improve the impact toughness of EBW and LW weldments by the extent of 7.4% and 8.8%, respectively. The aging treatment reduced the impact toughness by 49%, 33% and 15.5%, as well as the uniform elongation by 44%, 39% and 17% for TIG, EBW and LW, respectively. Aging treatment reduced the surface residual stress of TIG weldment by 58.8% in Y direction and 61.2% in X direction. Cryogenic treatment at could also release the surface residual stress of TIG weldment by 36.8% in X direction and 16.3% in Y direction. |
| first_indexed | 2024-04-11T12:50:29Z |
| format | Article |
| id | doaj.art-2857027718bc44dd9bf5e21c49e87221 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-11T12:50:29Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2857027718bc44dd9bf5e21c49e872212022-12-22T04:23:14ZengElsevierJournal of Materials Research and Technology2238-78542022-11-0121648661The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steelChen Cui0Kaixuan Gu1Yinan Qiu2Zeju Weng3Mingli Zhang4Junjie Wang5CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, China; Corresponding author.State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 100028, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, ChinaCAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding author.The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel thick plates were investigated in the present work. The results showed that fusion zone microstructure consisted of austenite matrix and vermicular ferrite. Aging treatment promoted the decomposition of δ-ferrite into σ-ferrites as well as the precipitation of carbides. Isothermal martensitic transformation in the Tungsten Inert Gas Welding (TIG) specimen was induced by cryogenic treatment, and stacking faults were increased. The fusion zone microstructure of Electron Beam Welding (EBW) and Laser Welding (LW) was finer than that of TIG, with acicular ferrite distributed in the austenite matrix. A large number of twins were generated in the austenite matrix after LW. Cryogenic treatment produced a large number of sub-grains in LW specimens, which was due to the entanglement and accumulation of dislocations in the vicinity of ferrite. Post-weld aging and cryogenic treatment have no influence on the strength of weldments with different welding methods while cryogenic treatment could improve the impact toughness of EBW and LW weldments by the extent of 7.4% and 8.8%, respectively. The aging treatment reduced the impact toughness by 49%, 33% and 15.5%, as well as the uniform elongation by 44%, 39% and 17% for TIG, EBW and LW, respectively. Aging treatment reduced the surface residual stress of TIG weldment by 58.8% in Y direction and 61.2% in X direction. Cryogenic treatment at could also release the surface residual stress of TIG weldment by 36.8% in X direction and 16.3% in Y direction.http://www.sciencedirect.com/science/article/pii/S2238785422014727Self-fusion weldingAustenite stainless steelCryogenic treatmentAging treatmentMechanical propertiesResidual stress |
| spellingShingle | Chen Cui Kaixuan Gu Yinan Qiu Zeju Weng Mingli Zhang Junjie Wang The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel Journal of Materials Research and Technology Self-fusion welding Austenite stainless steel Cryogenic treatment Aging treatment Mechanical properties Residual stress |
| title | The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel |
| title_full | The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel |
| title_fullStr | The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel |
| title_full_unstemmed | The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel |
| title_short | The effects of post-weld aging and cryogenic treatment on self-fusion welded austenitic stainless steel |
| title_sort | effects of post weld aging and cryogenic treatment on self fusion welded austenitic stainless steel |
| topic | Self-fusion welding Austenite stainless steel Cryogenic treatment Aging treatment Mechanical properties Residual stress |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422014727 |
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