Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steel
The effect of rare earth (RE) La on hydrogen diffusion and hydrogen embrittlement (HE) susceptibility of 42CrMo martensitic steel was studied by electrochemical hydrogen permeation test, hydrogen microprint technique (HMT) and slow strain rate tensile (SSRT). The results show that La modifies origin...
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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/S2238785425003941 |
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| author | Hanqiang Liu Xing Li Chaoyun Yang Yikun Luan Dianzhong Li |
| author_facet | Hanqiang Liu Xing Li Chaoyun Yang Yikun Luan Dianzhong Li |
| author_sort | Hanqiang Liu |
| collection | DOAJ |
| description | The effect of rare earth (RE) La on hydrogen diffusion and hydrogen embrittlement (HE) susceptibility of 42CrMo martensitic steel was studied by electrochemical hydrogen permeation test, hydrogen microprint technique (HMT) and slow strain rate tensile (SSRT). The results show that La modifies original Al2O3 and MnS inclusions and generates numerous well-dispersed RE inclusions. Individual RE inclusions with lower stress distribution exhibit a reduced propensity to promote HE and higher hydrogen trapping capacity than Al2O3 and MnS. Additionally, the addition of RE refines the grain structure and increases the number of high angle grain boundaries (HAGBs), effectively suppressing the propagation of hydrogen induced cracks. Compared to non-RE steel, the hydrogen diffusion coefficient of RE steel is reduced by up to 19.1%. As La content increases from 0 wt% to 0.011 wt% and 0.015 wt%, HE susceptibility of test steel decreases initially and then increases. Consequently, the appropriate addition of La can effectively impede hydrogen diffusion, improve hydrogen trapping efficiency and reduce HE susceptibility in martensitic steel. |
| format | Article |
| id | doaj-art-5fb97b07c35b4469936e79c3fcb23d40 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-5fb97b07c35b4469936e79c3fcb23d402025-08-20T02:14:54ZengElsevierJournal of Materials Research and Technology2238-78542025-03-01354805481810.1016/j.jmrt.2025.02.148Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steelHanqiang Liu0Xing Li1Chaoyun Yang2Yikun Luan3Dianzhong Li4Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning, 110016, People's Republic of China; School of Materials Science and Engineering, University of Science and Technology of China, 96 JinZhai Road, Baohe District, Hefei, Anhui, 230026, People's Republic of ChinaInstitute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning, 110016, People's Republic of China; Corresponding author.Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning, 110016, People's Republic of ChinaInstitute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning, 110016, People's Republic of China; School of Materials Science and Engineering, University of Science and Technology of China, 96 JinZhai Road, Baohe District, Hefei, Anhui, 230026, People's Republic of China; Corresponding author. Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning, 110016, People's Republic of China.Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, Liaoning, 110016, People's Republic of China; School of Materials Science and Engineering, University of Science and Technology of China, 96 JinZhai Road, Baohe District, Hefei, Anhui, 230026, People's Republic of ChinaThe effect of rare earth (RE) La on hydrogen diffusion and hydrogen embrittlement (HE) susceptibility of 42CrMo martensitic steel was studied by electrochemical hydrogen permeation test, hydrogen microprint technique (HMT) and slow strain rate tensile (SSRT). The results show that La modifies original Al2O3 and MnS inclusions and generates numerous well-dispersed RE inclusions. Individual RE inclusions with lower stress distribution exhibit a reduced propensity to promote HE and higher hydrogen trapping capacity than Al2O3 and MnS. Additionally, the addition of RE refines the grain structure and increases the number of high angle grain boundaries (HAGBs), effectively suppressing the propagation of hydrogen induced cracks. Compared to non-RE steel, the hydrogen diffusion coefficient of RE steel is reduced by up to 19.1%. As La content increases from 0 wt% to 0.011 wt% and 0.015 wt%, HE susceptibility of test steel decreases initially and then increases. Consequently, the appropriate addition of La can effectively impede hydrogen diffusion, improve hydrogen trapping efficiency and reduce HE susceptibility in martensitic steel.http://www.sciencedirect.com/science/article/pii/S2238785425003941Rare earthHydrogen diffusionHydrogen embrittlementMartensitic steelInclusion |
| spellingShingle | Hanqiang Liu Xing Li Chaoyun Yang Yikun Luan Dianzhong Li Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steel Journal of Materials Research and Technology Rare earth Hydrogen diffusion Hydrogen embrittlement Martensitic steel Inclusion |
| title | Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steel |
| title_full | Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steel |
| title_fullStr | Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steel |
| title_full_unstemmed | Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steel |
| title_short | Effect of rare earth La on hydrogen diffusion and hydrogen embrittlement susceptibility of 42CrMo martensitic steel |
| title_sort | effect of rare earth la on hydrogen diffusion and hydrogen embrittlement susceptibility of 42crmo martensitic steel |
| topic | Rare earth Hydrogen diffusion Hydrogen embrittlement Martensitic steel Inclusion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425003941 |
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