| Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels | |
| Shi Xianbo; Yan Wei; Wang Wei; Shan Yiyin; Yang Ke | |
| Corresponding Author | Yang Ke(kyang@imr.ac.cn) |
| 2018-10-11 | |
| Source Publication | ACTA METALLURGICA SINICA
 |
| ISSN | 0412-1961 |
| Volume | 54Issue:10Pages:1343-1349 |
| Abstract | Hydrogen-induced cracking (HIC) resistance of pipeline steels is one of the most important properties for sour gas service pipelines. For the conventional pipeline steels, the strength level mainly depends on the Mn content. However, as the Mn content increases, the unfavorable microstructures such as large size martensite/austenite (M/A) islands, bainite or martensite will be generated, which will deteriorate the HIC resistance of the steels. Therefore, it is hard to simultaneously improve strength level and HIC resistance for pipeline steel. The nature of HIC in pipeline steel is hydrogen embrittlement, which is essentially the redistribution of H atoms into the matrix of steel. So, how to make the distribution of H atoms in the steel as evenly as possible without causing local enrichment is a key factor to improve the HIC of pipeline steels. In this work, the susceptibilities of HIC of traditional X80 and novel Cu-bearing pipeline steels were studied with comparison. The results showed that the X80 pipeline steel behaved bad HIC resistance. The hydrogen-induced cracks mainly expanded along the interface between M/A islands and the matrix. However, the novel Cu-bearing pipeline steels with different Cu contents exhibited excellent HIC resistance, showing no cracks were produced after HIC test. It was analyzed that nanosized Cu-rich precipitates in the Cu-bearing pipeline steels are speculated to act as the beneficial hydrogen traps, and these uniformly dispersed fine Cu-rich phases in matrix provide many sites for the distribution of H atoms, which helps to avoid the localized high concentration H atoms enrichment leading to hydrogen embrittlement. Taking nano-sized Cu-rich phases as a type of beneficial hydrogen traps provides a new way for the development of new pipeline steels with high strength and excellent HIC resistance. |
| Keyword | pipeline steel Cu hydrogen-induced cracking Cu-rich phase hydrogen trap |
| Funding Organization | Shenyang Science and Technology Research Funding |
| DOI | 10.11900/0412.1961.2017.00522 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Shenyang Science and Technology Research Funding[18-013-0-53] |
| WOS Research Area | Metallurgy & Metallurgical Engineering |
| WOS Subject | Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000446009000001 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/129628 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yang Ke |
| Affiliation | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China |
| Recommended Citation GB/T 7714 | Shi Xianbo,Yan Wei,Wang Wei,et al. Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels[J]. ACTA METALLURGICA SINICA,2018,54(10):1343-1349. |
| APA | Shi Xianbo,Yan Wei,Wang Wei,Shan Yiyin,&Yang Ke.(2018).Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels.ACTA METALLURGICA SINICA,54(10),1343-1349. |
| MLA | Shi Xianbo,et al."Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels".ACTA METALLURGICA SINICA 54.10(2018):1343-1349. |
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