|
|
Molecular dynamics study of hydrogen-induced cracking behavior of ferrite–pearlite gas transmission pipeline steel |
Tao-long Xu1, Si-han Guo1, Gong-zhen He1,2, Hao-yu Han1 |
1 Petroleum Engineering School, Southwest Petroleum University, Chengdu 610500, Sichuan, China 2 Sichuan East Gas Transmission Sales Center of Sinopec Natural Gas Branch, Wuhan 430074, Hubei, China |
|
|
Abstract Hydrogen embrittlement of pipelines depends on the hydrogen-induced cracking behavior of the pipeline steel microstructure. Based on molecular dynamics analysis, the ferrite–cementite (a-Fe/Fe3C) lamellar atomic structure with the Bagaryatskii orientation relationship was established, and stepwise relaxation of the conjugate gradient energy minimization and constant-temperature and constant-pressure relaxation were performed under NPT (the isothermal–isobaric) conditions. The mechanical property curves of the a-Fe/Fe3C models were obtained under different cementite terminal plane structures, and the evolution of the atomic structure was analyzed in detail. In addition, the influence of different hydrogen concentrations, different temperatures, different strain rates, changes in voids, and different micro-degrees of freedom on the deformation and failure mechanism of the model was investigated, aiming to provide a reliable way to explore the micro-mechanism of macro-cracking behavior of pipeline steel.
|
|
|
|
|
Cite this article: |
Tao-long Xu1,Si-han Guo1,Gong-zhen He1, et al. Molecular dynamics study of hydrogen-induced cracking behavior of ferrite–pearlite gas transmission pipeline steel[J]. Journal of Iron and Steel Research International, 2024, 31(02): 488-500.
|
|
|
|
[1] |
Yao-zu Wang, Jian-liang Zhang, Qiang Cheng, Hui-qing Jiang, Zheng-jian Liu, Yu-bo Tan. Interface interaction between SiO2 and magnetite under high temperature: particle migration and inhibition mechanism[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2024, 31(3): 561-572. |
[2] |
Pu Wang, Liang Chen, Qun-wei Tang, Wei-tao Li, Shao-xiang Li, Jia-quan Zhang. Propagation form of internal cracks induced by continuous casting soft reduction and control strategy for internal quality[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2024, 31(3): 622-633. |
[3] |
Lan-zhou Liu, Yi-fei Gao, Jin-hui Du, Teng An. Oxidation damage zone formed in creep fatigue crack growth of GH4169 alloy at 650 C[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(12): 2582-2592. |
[4] |
Ming-ming Wang, Xiu-hua Gao, Li-ying Song, Cheng-lin Zhu, Lin-xiu Du, Raja Devesh Kumar Misra. Hydrogen trapping and electrochemical corrosion behavior of V–N microalloyed X80 pipeline steels consisting of acicular ferrite and polygonal ferrite[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(10): 1683-1693. |
[5] |
Xin Dai, Yue-feng Chen, Peng Wang, Li Zhang, Bin Yang, Lian-sheng Chen. Mechanical and fatigue properties of SA508-IV steel used for nuclear reactor pressure vessels[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(08): 1312-1321. |
[6] |
Yang Chen, Sheng-ping He, Zhi-rong Li, Xu-bin Zhang, Qiang-qiang Wang, Qian Wang. Properties and structure of a new non-reactive mold flux for high-Al steel[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(01): 61-70. |
|
|
|
|