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| Atomic-scale mechanism of effect of co-separation of elements at interface of ferrite and austenite on Cr-depleted zone of duplex stainless steel |
| Yan-hui Hou1,2, Ze-kun Xu1,2, Shi-long Zhou1,2, Guang-qiang Li1,2 |
| 1 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China 2 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China |
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Abstract Three-dimensional atom-probe tomography and first-principles calculation combined with density functional theory were used to study the effect of the co-segregation of different elements formed during the solidification process of S32205 duplex stainless steel on the Cr-depleted zone at the interface between ferrite and austenite. It was found that the cosegregation of different elements formed during the solidification process of duplex stainless steel can also form Crdepleted zone at the interface between ferrite and austenite. Moreover, Mo, Si, B, C and P atoms promote co-segregation with Cr atoms, which promotes the formation of Cr-depleted zone at the interface between ferrite and austenite in duplex stainless steel. Mo and Si strongly promote the segregation of Cr at the interface between ferrite and austenite, thereby promoting the formation of Cr-depleted zone. B, C and P elements also promote the segregation of Cr element at the interface between ferrite and austenite and the formation of Cr-depleted zone, but their effect is weaker than that of Mo and Si elements. These conclusions provide a new theoretical basis for improving the intergranular corrosion performance of duplex stainless steel.
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| Cite this article: |
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Yan-hui Hou,Ze-kun Xu,Shi-long Zhou, et al. Atomic-scale mechanism of effect of co-separation of elements at interface of ferrite and austenite on Cr-depleted zone of duplex stainless steel[J]. Journal of Iron and Steel Research International, 2024, 31(3): 710-718.
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| [1] |
Xiang-jun Liu, Ji-chun Yang, Hui-ping Ren, Xiao-bin Jia, Ming-yi Zhang, Chang-qiao Yang. Effect of solute Ce, Mn, and Si on mechanical properties of silicon steel: insights from DFT calculations[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2024, 31(3): 700-709. |
| [2] |
Hai-hui Zhang, Hui-hui Xiong, Jing Qin, Jian-bo Zhang. Mechanism of ferrite nucleation induced by Y2O2S inclusion in low carbon steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(6): 1291-1299. |
| [3] |
Zi-tian Zhang, Jing-jing Wang, Wei Liu, Xiao-gang Lu. Simulation of BCC dissolution in Fe–Cr–Ni system by ICME[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(4): 660-676. |
| [4] |
Dai-wei Yang, Wei Wang, Jing-xuan Li, Xu-heng Chen, Peng-fei Chen. Effect of Al2O3/SiO2 ratio on morphology of complex calcium ferrite[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(10): 1921-1928. |
| [5] |
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| [6] |
Xiao-han Wu, Zhi-gang Song, Bao-shun Wang, Ming-hua Wu, Qi-liang Nai, Liang Yao, Han Feng, Wen-jie Zheng. Morphologies of secondary austenite in 2507 duplex stainless steel after heat treatment[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(6): 994-1003. |
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2024, Vol. 31 
