The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater
文献类型：CNKI期刊论文
| 作者 | Yong Li; Zhiyong Liu; Endian Fan; Zhongyu Cui; Jinbin Zhao |
| 发表日期 | 2020-10-01 |
| 出处 | Journal of Materials Science & Technology
 |
| 关键词 | Low alloy steel Stress state Cathodic potential Crack tip environment Crack growth behaviour |
| 英文摘要 | The environment at crack tip and its effect on the crack growth behaviour of low alloy steel-E690 steel were studied at cathodic potentials in artificial seawater. The results showed that the micro environment at crack tip and crack growth behaviour were related to the electrochemical reactions at crack tip, which were affected by the stress state and applied potentials. The crack tip environment was acidified under cyclic loading, resulting from the crack tip anodic dissolution reaction and corresponding hydrolysis reaction. Because of the hydrogen evolution and the inhibited anodic dissolution inside the crack, the crack tip p H increases as the cathodic potential decreases. The effect of cathodic potentials on the electrochemical reactions caused the variation of the hydrogen content, which influenced the crack growth rate because the crack growth behaviour was controlled by hydrogen embrittlement mechanism. This resulted in a fact that with the negative decrease of potential, the crack growth rate first decreased and then increased,with the minimum rate at-0.75 V. And the crack growth path exhibited transgranular fracture. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | financially supported by the Open Fund of Shandong Key Laboratory of Corrosion Science (No. KLCS201909) ; the National Natural Science Foundation of China (Nos. 51771028, 51871024 and 51601182) |
| 卷 | v.54期:19页:121-133 |
| 语种 | 英文; |
| 分类号 | TG142.33 |
| ISSN号 | 1005-0302 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187992]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.JiangsuKeyLaboratoryforPremiumSteelMaterial,NanjingIron&SteelUnitedCo.,Ltd. 2.CorrosionandProtectionCenter,UniversityofScienceandTechnologyBeijing 3.ShandongKeyLaboratoryofCorrosionScience,InstituteofOceanology,ChineseAcademyofSciences 4.SchoolofMaterialsScienceandEngineering,OceanUniversityofChina |
| 推荐引用方式 GB/T 7714 | Yong Li,Zhiyong Liu,Endian Fan,et al. The effect of crack tip environment on crack growth behaviour of a low alloy steel at cathodic potentials in artificial seawater. 2020. |
入库方式： OAI收割
来源：海洋研究所
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