Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behavior
The multi-microalloying treatment was applied to Cu-bearing marine steel to regulate its precipitation behavior with aim of reinforcing the balance between strength and toughness. The results indicated that the incorporation of Ti created cuboidal Ti(C,N) particles alongside a quantity of finer sphe...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425013134 |
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| author | Ning Zhao Qiangqiang Zhao Yanlin He Qinghui Huo Jingjing Wang Honglei Shen Yi Yang Jie Ye Lin Liu |
| author_facet | Ning Zhao Qiangqiang Zhao Yanlin He Qinghui Huo Jingjing Wang Honglei Shen Yi Yang Jie Ye Lin Liu |
| author_sort | Ning Zhao |
| collection | DOAJ |
| description | The multi-microalloying treatment was applied to Cu-bearing marine steel to regulate its precipitation behavior with aim of reinforcing the balance between strength and toughness. The results indicated that the incorporation of Ti created cuboidal Ti(C,N) particles alongside a quantity of finer spherical (Ti,V)C precipitates. The formation of rich-Ti carbonitride refined the prior austenite grains (PAGs) and facilitated the nucleation of Cu-rich particles, leading to an increase in the content while inhibiting their coarsening and structural transformation. The strengthening contributions from grain boundary and precipitation enhanced by co-precipitation of Cu and MC carbonitrides were sufficient to compensate for the loss of dislocation strengthening and solid solution strengthening caused by the consumption of C content in the matrix due to the formation of MC carbides. Consequently, V–Ti steel exhibited better tensile properties and excellent tempering stability, with its yield strength (YS) exceeding that of V steel by 78 MPa after tempering at 620 °C. Simultaneously, the presence of MC and M3C carbides diminished the precipitation kinetics of M23C6 carbides, mitigating the adverse effects on interfacial bonding strength due to the decrease in content. Combining the softening effect resulting from the reduced C concentration in the matrix and the preventing effect of high angle grain boundaries (HAGBs) increased by grain refinement on cracks propagation, the transverse cryogenic impact toughness of V–Ti steel was significantly improved, with an impact energy maintained at ∼50 J after tempering at 460–580 °C, and even increased to 75 J at 620 °C because of further recovery/recrystallization. |
| format | Article |
| id | doaj-art-e3a1ba7a2ea9433cb6f7a4601464c11d |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-e3a1ba7a2ea9433cb6f7a4601464c11d2025-08-20T03:48:14ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01369773978910.1016/j.jmrt.2025.05.157Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behaviorNing Zhao0Qiangqiang Zhao1Yanlin He2Qinghui Huo3Jingjing Wang4Honglei Shen5Yi Yang6Jie Ye7Lin Liu8School of Mechanical Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, 213032, China; State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China; Qianchao Sunway Co., Yancheng, Jiangsu, 224100, ChinaState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, ChinaState Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Corresponding author.State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Corresponding author.Ansteel Group Beijing Research Institute, Beijing, 102211, ChinaSchool of Mechanical Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, 213032, ChinaQianchao Sunway Co., Yancheng, Jiangsu, 224100, ChinaSchool of Mechanical Engineering, Changzhou Institute of Technology, Changzhou, Jiangsu, 213032, ChinaSchool of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, ChinaThe multi-microalloying treatment was applied to Cu-bearing marine steel to regulate its precipitation behavior with aim of reinforcing the balance between strength and toughness. The results indicated that the incorporation of Ti created cuboidal Ti(C,N) particles alongside a quantity of finer spherical (Ti,V)C precipitates. The formation of rich-Ti carbonitride refined the prior austenite grains (PAGs) and facilitated the nucleation of Cu-rich particles, leading to an increase in the content while inhibiting their coarsening and structural transformation. The strengthening contributions from grain boundary and precipitation enhanced by co-precipitation of Cu and MC carbonitrides were sufficient to compensate for the loss of dislocation strengthening and solid solution strengthening caused by the consumption of C content in the matrix due to the formation of MC carbides. Consequently, V–Ti steel exhibited better tensile properties and excellent tempering stability, with its yield strength (YS) exceeding that of V steel by 78 MPa after tempering at 620 °C. Simultaneously, the presence of MC and M3C carbides diminished the precipitation kinetics of M23C6 carbides, mitigating the adverse effects on interfacial bonding strength due to the decrease in content. Combining the softening effect resulting from the reduced C concentration in the matrix and the preventing effect of high angle grain boundaries (HAGBs) increased by grain refinement on cracks propagation, the transverse cryogenic impact toughness of V–Ti steel was significantly improved, with an impact energy maintained at ∼50 J after tempering at 460–580 °C, and even increased to 75 J at 620 °C because of further recovery/recrystallization.http://www.sciencedirect.com/science/article/pii/S2238785425013134Marine steelHigh strengthLow-temperature toughnessMulti-microalloyingCu-rich phase |
| spellingShingle | Ning Zhao Qiangqiang Zhao Yanlin He Qinghui Huo Jingjing Wang Honglei Shen Yi Yang Jie Ye Lin Liu Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behavior Journal of Materials Research and Technology Marine steel High strength Low-temperature toughness Multi-microalloying Cu-rich phase |
| title | Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behavior |
| title_full | Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behavior |
| title_fullStr | Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behavior |
| title_full_unstemmed | Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behavior |
| title_short | Enhancing strength-toughness synergy of Cu-containing marine steel via regulating precipitation behavior |
| title_sort | enhancing strength toughness synergy of cu containing marine steel via regulating precipitation behavior |
| topic | Marine steel High strength Low-temperature toughness Multi-microalloying Cu-rich phase |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425013134 |
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