Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes
The current work examines hydrogen sensitivity in different pipeline steels (X65, X70 and X80 HSLA grades) from four productions. Hydrogen Induced Cracking (HIC) experiments were performed and then the welds were characterized via optical and scanning electron microscopy techniques. The optical micr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2018-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://doi.org/10.1051/matecconf/201818804010 |
| _version_ | 1818657264771268608 |
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| author | Bouzouni Marianthi Gavalas Evangelos Chatzigeorgiou Filippos Papaefthymiou Spyros |
| author_facet | Bouzouni Marianthi Gavalas Evangelos Chatzigeorgiou Filippos Papaefthymiou Spyros |
| author_sort | Bouzouni Marianthi |
| collection | DOAJ |
| description | The current work examines hydrogen sensitivity in different pipeline steels (X65, X70 and X80 HSLA grades) from four productions. Hydrogen Induced Cracking (HIC) experiments were performed and then the welds were characterized via optical and scanning electron microscopy techniques. The optical micrographs revealed cracks only in one of the four welds. Transverse cracks were found along bainitic-ferrite/carbide islands within the heat affected zone and the base metal of production B. Found inclusions e.g. MnS inside the cracks acted as initiation points for the HIC. However, the weld zones in all productions consisting of acicular ferrite and grain boundary ferrite were found to be resistant in hydrogen embrittlement. Therefore, the presence of bainitic ferrite with carbides at the grain boundaries in the microstructures and the intense presence of MnS inclusions caused HIC in pipeline steel from production B. The manufacturing process, the forming and welding conditions in the examined case seem not to have negatively influenced the pipeline steel in terms of HIC. |
| first_indexed | 2024-12-17T03:38:43Z |
| format | Article |
| id | doaj.art-0f2f583fbf5f4e988013d501a2382547 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-12-17T03:38:43Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-0f2f583fbf5f4e988013d501a23825472022-12-21T22:05:04ZengEDP SciencesMATEC Web of Conferences2261-236X2018-01-011880401010.1051/matecconf/201818804010matecconf_iceaf-v2018_04010Hydrogen Induced Crack Development in Submerged Arc Welded Steel PipesBouzouni MarianthiGavalas EvangelosChatzigeorgiou FilipposPapaefthymiou SpyrosThe current work examines hydrogen sensitivity in different pipeline steels (X65, X70 and X80 HSLA grades) from four productions. Hydrogen Induced Cracking (HIC) experiments were performed and then the welds were characterized via optical and scanning electron microscopy techniques. The optical micrographs revealed cracks only in one of the four welds. Transverse cracks were found along bainitic-ferrite/carbide islands within the heat affected zone and the base metal of production B. Found inclusions e.g. MnS inside the cracks acted as initiation points for the HIC. However, the weld zones in all productions consisting of acicular ferrite and grain boundary ferrite were found to be resistant in hydrogen embrittlement. Therefore, the presence of bainitic ferrite with carbides at the grain boundaries in the microstructures and the intense presence of MnS inclusions caused HIC in pipeline steel from production B. The manufacturing process, the forming and welding conditions in the examined case seem not to have negatively influenced the pipeline steel in terms of HIC.https://doi.org/10.1051/matecconf/201818804010 |
| spellingShingle | Bouzouni Marianthi Gavalas Evangelos Chatzigeorgiou Filippos Papaefthymiou Spyros Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes MATEC Web of Conferences |
| title | Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes |
| title_full | Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes |
| title_fullStr | Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes |
| title_full_unstemmed | Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes |
| title_short | Hydrogen Induced Crack Development in Submerged Arc Welded Steel Pipes |
| title_sort | hydrogen induced crack development in submerged arc welded steel pipes |
| url | https://doi.org/10.1051/matecconf/201818804010 |
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