In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process
In-situ study on the high-temperature fracture behaviour of 347 stainless steel was carried out by using a confocal laser scanning microscope (CLSM). The welding microstructures of the 347 stainless steel were simulated by subjecting the steel specimen to solution and aging treatments. Undissolved N...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2021-12-01
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| Series: | Archives of Metallurgy and Materials |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/119290/PDF/AMM-2021-4-19-Byoungchul%20Hwang.pdf |
| _version_ | 1811314059056775168 |
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| author | Seok-Woo Ko Hyeonwoo Park Il Yoo Hansoo Kim Joonho Lee Byoungchul Hwang |
| author_facet | Seok-Woo Ko Hyeonwoo Park Il Yoo Hansoo Kim Joonho Lee Byoungchul Hwang |
| author_sort | Seok-Woo Ko |
| collection | DOAJ |
| description | In-situ study on the high-temperature fracture behaviour of 347 stainless steel was carried out by using a confocal laser scanning microscope (CLSM). The welding microstructures of the 347 stainless steel were simulated by subjecting the steel specimen to solution and aging treatments. Undissolved NbC carbides were present within grains after solution treatment, and M23C6 carbides were preferentially formed at grain boundaries after subsequent aging treatment. The M23C6 carbides formed at grain boundaries worked as stress concentration sites and thus generated larger cracks during high-temperature tensile testing. In addition, grain boundary embrittlement was found to be a dominant mechanism for the high-temperature fracture of the 347 stainless steel because vacancy diffusion in the Cr-depleted zones enhances intergranular fracture due to the precipitation of M23C6 carbides at grain boundaries. |
| first_indexed | 2024-04-13T11:05:13Z |
| format | Article |
| id | doaj.art-2885fa345aa84f00b346701f84139c49 |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-04-13T11:05:13Z |
| publishDate | 2021-12-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-2885fa345aa84f00b346701f84139c492022-12-22T02:49:17ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092021-12-01vol. 66No 410191022https://doi.org/10.24425/amm.2021.136417In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding ProcessSeok-Woo Ko0https://orcid.org/0000-0001-6317-8808Hyeonwoo Park1https://orcid.org/0000-0003-2562-4656Il Yoo2https://orcid.org/0000-0002-5808-2315Hansoo Kim3https://orcid.org/0000-0002-4014-8670Joonho Lee4https://orcid.org/0000-0002-9464-6480Byoungchul Hwang5https://orcid.org/0000-0001-6330-4747Seoul National University of Science and Technology, Department of Materials Science and Engineering, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of KoreaKorea University, Department of Materials Science and Engineering, Seoul 02841, Republic of KoreaADNOC LNG, Abu Dhabi, United Arab EmiratesKorea University, Department of Materials Science and Engineering, Seoul 02841, Republic of KoreaKorea University, Department of Materials Science and Engineering, Seoul 02841, Republic of KoreaSeoul National University of Science and Technology, Department of Materials Science and Engineering, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Republic of KoreaIn-situ study on the high-temperature fracture behaviour of 347 stainless steel was carried out by using a confocal laser scanning microscope (CLSM). The welding microstructures of the 347 stainless steel were simulated by subjecting the steel specimen to solution and aging treatments. Undissolved NbC carbides were present within grains after solution treatment, and M23C6 carbides were preferentially formed at grain boundaries after subsequent aging treatment. The M23C6 carbides formed at grain boundaries worked as stress concentration sites and thus generated larger cracks during high-temperature tensile testing. In addition, grain boundary embrittlement was found to be a dominant mechanism for the high-temperature fracture of the 347 stainless steel because vacancy diffusion in the Cr-depleted zones enhances intergranular fracture due to the precipitation of M23C6 carbides at grain boundaries.https://journals.pan.pl/Content/119290/PDF/AMM-2021-4-19-Byoungchul%20Hwang.pdf347 stainless steelin-situhigh temperaturefracture behaviourweldingconfocal laser scanning microscope (clsm) |
| spellingShingle | Seok-Woo Ko Hyeonwoo Park Il Yoo Hansoo Kim Joonho Lee Byoungchul Hwang In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process Archives of Metallurgy and Materials 347 stainless steel in-situ high temperature fracture behaviour welding confocal laser scanning microscope (clsm) |
| title | In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process |
| title_full | In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process |
| title_fullStr | In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process |
| title_full_unstemmed | In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process |
| title_short | In-situ Observation of High-Temperature Fracture Behaviour of 347 Stainless Steel Subjected to Simulated Welding Process |
| title_sort | in situ observation of high temperature fracture behaviour of 347 stainless steel subjected to simulated welding process |
| topic | 347 stainless steel in-situ high temperature fracture behaviour welding confocal laser scanning microscope (clsm) |
| url | https://journals.pan.pl/Content/119290/PDF/AMM-2021-4-19-Byoungchul%20Hwang.pdf |
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