Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times
Fe and Cr phase separation in ferrite, causing 475 °C-embrittlement, was studied after very short aging times in super duplex stainless steel (SDSS) and hyper duplex stainless steel (HDSS) plates and welds. Atom probe tomography showed that hot-rolled SDSS, experiencing significant metal working, ha...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127521006109 |
| _version_ | 1818691617509343232 |
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| author | Vahid A Hosseini Mattias Thuvander Kristina Lindgren James Oliver Nicklas Folkeson Daniel Gonzalez Leif Karlsson |
| author_facet | Vahid A Hosseini Mattias Thuvander Kristina Lindgren James Oliver Nicklas Folkeson Daniel Gonzalez Leif Karlsson |
| author_sort | Vahid A Hosseini |
| collection | DOAJ |
| description | Fe and Cr phase separation in ferrite, causing 475 °C-embrittlement, was studied after very short aging times in super duplex stainless steel (SDSS) and hyper duplex stainless steel (HDSS) plates and welds. Atom probe tomography showed that hot-rolled SDSS, experiencing significant metal working, had faster kinetics of phase separations compared to the SDSS and HDSS welds after 5 min aging at 475 °C. The surface of the 33-mm SDSS plate had faster Fe and Cr phase separation and larger toughness drop. A higher density of dislocations next to the austenite phase boundary in ferrite, detected by electron channeling contrast, can promote the phase separation at the surface of the plate with lower austenite spacing. The toughness dropped in HDSS welds after aging, but SDSS welds maintained their toughness. An inverse simulation method considering an initial sinusoidal nanometric Cr and Fe fluctuation showed that Ni increases the interdiffusion of Cr in the system, resulting a higher degree of phase separation in SDSS welds than the HDSS weld. Within the composition range of the studied SDSS and HDSS materials, the processing influences the Fe and Cr phase separation more than the variation in composition during short aging or typical fabrication times. |
| first_indexed | 2024-12-17T12:44:45Z |
| format | Article |
| id | doaj.art-0d91b62c6b41480c8efd51b51c56e5de |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-17T12:44:45Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-0d91b62c6b41480c8efd51b51c56e5de2022-12-21T21:47:47ZengElsevierMaterials & Design0264-12752021-11-01210110055Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging timesVahid A Hosseini0Mattias Thuvander1Kristina Lindgren2James Oliver3Nicklas Folkeson4Daniel Gonzalez5Leif Karlsson6Department of Engineering Science, University West, SE-461 86 Trollhättan, Sweden; Corresponding author at: Department of Engineering Science, University West, SE-461 86 Trollhättan, SwedenDepartment of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, SwedenDepartment of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, SwedenOutokumpu Stainless AB, SE-774 41 Avesta, SwedenESAB AB, SE-417 55 Göteborg, SwedenBodycote, SE-735 23 Surahammar, SwedenDepartment of Engineering Science, University West, SE-461 86 Trollhättan, SwedenFe and Cr phase separation in ferrite, causing 475 °C-embrittlement, was studied after very short aging times in super duplex stainless steel (SDSS) and hyper duplex stainless steel (HDSS) plates and welds. Atom probe tomography showed that hot-rolled SDSS, experiencing significant metal working, had faster kinetics of phase separations compared to the SDSS and HDSS welds after 5 min aging at 475 °C. The surface of the 33-mm SDSS plate had faster Fe and Cr phase separation and larger toughness drop. A higher density of dislocations next to the austenite phase boundary in ferrite, detected by electron channeling contrast, can promote the phase separation at the surface of the plate with lower austenite spacing. The toughness dropped in HDSS welds after aging, but SDSS welds maintained their toughness. An inverse simulation method considering an initial sinusoidal nanometric Cr and Fe fluctuation showed that Ni increases the interdiffusion of Cr in the system, resulting a higher degree of phase separation in SDSS welds than the HDSS weld. Within the composition range of the studied SDSS and HDSS materials, the processing influences the Fe and Cr phase separation more than the variation in composition during short aging or typical fabrication times.http://www.sciencedirect.com/science/article/pii/S0264127521006109Spinodal decompositionDuplex stainless steelsAtom probe tomographyWelding, hot rolling475°C-embrittlement |
| spellingShingle | Vahid A Hosseini Mattias Thuvander Kristina Lindgren James Oliver Nicklas Folkeson Daniel Gonzalez Leif Karlsson Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times Materials & Design Spinodal decomposition Duplex stainless steels Atom probe tomography Welding, hot rolling 475°C-embrittlement |
| title | Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times |
| title_full | Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times |
| title_fullStr | Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times |
| title_full_unstemmed | Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times |
| title_short | Fe and Cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times |
| title_sort | fe and cr phase separation in super and hyper duplex stainless steel plates and welds after very short aging times |
| topic | Spinodal decomposition Duplex stainless steels Atom probe tomography Welding, hot rolling 475°C-embrittlement |
| url | http://www.sciencedirect.com/science/article/pii/S0264127521006109 |
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