Hydrogen Embrittlement of 27Cr−4Mo−2Ni Super Ferritic Stainless Steel
Autor: | Fei Yang, Yujin Nie, Huiyun Zhang, Weiqiang Niu, Quanxin Shi, Jinyao Ma, Liuwei Zheng, Wei Liang |
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Jazyk: | angličtina |
Rok vydání: | 2024 |
Předmět: |
super ferritic stainless steel
hydrogen embrittlement mechanical properties yield strength fracture behavior Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 |
Zdroj: | Materials, Vol 17, Iss 7, p 1546 (2024) |
Druh dokumentu: | article |
ISSN: | 1996-1944 |
DOI: | 10.3390/ma17071546 |
Popis: | The effect of hydrogen content on the deformation and fracture behavior of 27Cr−4Mo−2Ni super ferritic stainless steel (SFSS) was investigated in this study. It was shown that the plasticity and yield strength of SFSS were very susceptible to hydrogen content. The introduction of hydrogen led to a significant decrease in elongation and a concurrent increase in yield strength. Nevertheless, a critical threshold was identified in the elongation reduction, after which the elongation remained approximately constant even with more hydrogen introduced, while the yield strength exhibited a monotonic increase with increasing hydrogen content within the experimental range, attributed to the pinning effect of the hydrogen Cottrell atmosphere on dislocations. Furthermore, the hydrogen-charged SFSS shows an apparent drop in flow stress after upper yielding and a reduced work hardening rate during the subsequent plastic deformation. The more hydrogen is charged, the more the flow stress drops, and the lower the work hardening rate becomes. |
Databáze: | Directory of Open Access Journals |
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