Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded joint
Novel Fe–23Mn-0.45C-3.5Cr cryogenic steel welded joint was fabricated by a gas metal arc welding process. To determine the reason for the degraded impact toughness in heat-affected zone (HAZ), the microstructure and carbide precipitates were investigated. The residual stress of welded joint was also...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425001140 |
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| author | Jiang Yang Honggang Dong Guangfeng Wu Feng Xiong |
| author_facet | Jiang Yang Honggang Dong Guangfeng Wu Feng Xiong |
| author_sort | Jiang Yang |
| collection | DOAJ |
| description | Novel Fe–23Mn-0.45C-3.5Cr cryogenic steel welded joint was fabricated by a gas metal arc welding process. To determine the reason for the degraded impact toughness in heat-affected zone (HAZ), the microstructure and carbide precipitates were investigated. The residual stress of welded joint was also calculated, measured and verified, respectively. The results reveal that abnormal grain growth occurred in HAZ, and the average grain size of base metal and HAZ is about 36.9 μm and 103.8 μm, respectively, but there was no phase transformation. A large number of continuous lamellar or rod-shaped precipitates with a size of 200 nm × 60 nm, identified as Cr23C6 carbides, can be observed along the grain boundary in HAZ. On this basis, the formation mechanism of carbides precipitated at the grain boundary in HAZ was analyzed. In addition, a high tensile residual stress is about 520 MPa appeared in HAZ, which gradually decreased with increasing distance from the fusion line. The microhardness of HAZ had a similar trend to the residual stress, but it was higher than that of the base metal. The impact toughness of HAZ was significantly lower than that of base metal, which increased with increasing distance from the fusion line. This was mainly attributed to the welding residual stress and the precipitation of carbides in HAZ. |
| format | Article |
| id | doaj-art-1e47573228474d1f817fa20b98847aa4 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-1e47573228474d1f817fa20b98847aa42025-01-21T04:13:08ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013513351347Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded jointJiang Yang0Honggang Dong1Guangfeng Wu2Feng Xiong3Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Special Welding Materials and Technology (Chongqing University of Technology), Chongqing, 400054, China; Corresponding author.School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China; Corresponding author.Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Special Welding Materials and Technology (Chongqing University of Technology), Chongqing, 400054, ChinaSchool of Vehicle Engineering, Chongqing University of Technology, Chongqing, 400054, ChinaNovel Fe–23Mn-0.45C-3.5Cr cryogenic steel welded joint was fabricated by a gas metal arc welding process. To determine the reason for the degraded impact toughness in heat-affected zone (HAZ), the microstructure and carbide precipitates were investigated. The residual stress of welded joint was also calculated, measured and verified, respectively. The results reveal that abnormal grain growth occurred in HAZ, and the average grain size of base metal and HAZ is about 36.9 μm and 103.8 μm, respectively, but there was no phase transformation. A large number of continuous lamellar or rod-shaped precipitates with a size of 200 nm × 60 nm, identified as Cr23C6 carbides, can be observed along the grain boundary in HAZ. On this basis, the formation mechanism of carbides precipitated at the grain boundary in HAZ was analyzed. In addition, a high tensile residual stress is about 520 MPa appeared in HAZ, which gradually decreased with increasing distance from the fusion line. The microhardness of HAZ had a similar trend to the residual stress, but it was higher than that of the base metal. The impact toughness of HAZ was significantly lower than that of base metal, which increased with increasing distance from the fusion line. This was mainly attributed to the welding residual stress and the precipitation of carbides in HAZ.http://www.sciencedirect.com/science/article/pii/S2238785425001140Cryogenic high-manganese steelFinite element analysisMicrostructureResidual stressMechanical property |
| spellingShingle | Jiang Yang Honggang Dong Guangfeng Wu Feng Xiong Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded joint Journal of Materials Research and Technology Cryogenic high-manganese steel Finite element analysis Microstructure Residual stress Mechanical property |
| title | Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded joint |
| title_full | Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded joint |
| title_fullStr | Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded joint |
| title_full_unstemmed | Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded joint |
| title_short | Experimental and numerical simulation study on microstructure, residual stress and mechanical properties of Fe–Mn–C–Cr cryogenic high-manganese steel arc-welded joint |
| title_sort | experimental and numerical simulation study on microstructure residual stress and mechanical properties of fe mn c cr cryogenic high manganese steel arc welded joint |
| topic | Cryogenic high-manganese steel Finite element analysis Microstructure Residual stress Mechanical property |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425001140 |
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