Effects of TIG Reheating on Duplex Stainless Steel Weld Microstructure
Duplex stainless steels (DSS) gaining their excellent mechanical properties and corrosion resistance due to their austenitic-ferritic microstructure, ideally in the same amount. However, to keep this ideal phase ratio during arc welding is very difficult. Generally, the arc welding processes will r...
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| Format: | Article |
| Language: | English |
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Faculty of Engineering, University of Debrecen
2019-03-01
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| Series: | International Journal of Engineering and Management Sciences |
| Online Access: | https://ojs.lib.unideb.hu/IJEMS/article/view/5237 |
| _version_ | 1827162190218526720 |
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| author | Balázs Varbai Ferenc Tolnai Kornél Májlinger |
| author_facet | Balázs Varbai Ferenc Tolnai Kornél Májlinger |
| author_sort | Balázs Varbai |
| collection | DOAJ |
| description |
Duplex stainless steels (DSS) gaining their excellent mechanical properties and corrosion resistance due to their austenitic-ferritic microstructure, ideally in the same amount. However, to keep this ideal phase ratio during arc welding is very difficult. Generally, the arc welding processes will result in more ferritic microstructure in the weld metal and in the heat affected zone, due to the rapid cooling. The ferritic microstructure can cause chromiumnitride precipitation, because the nitrogen solubility in ferrite phase is very low below 700 °C. These chromiumnitride precipitations can cause loss of corrosion resistance and mechanical properties. However, during subsequent reheating, the chromium-nitrides can dissolve and act as a secondary austenite nucleation site in the ferritic microstructure. In our research we welded DSS specimen autogenously, with tungsten inert gas welding using pure argon and 94 % argon + 6 % nitrogen as shielding gasses. In the first case the sub-sequent solid-state reheating caused 20 % increase in the austenite fraction of the weld metal but with the use of mixed shielding gas only 5 % increase.
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| first_indexed | 2024-03-11T16:58:16Z |
| format | Article |
| id | doaj.art-4bd9c71297f140bb906b89cca0ccc583 |
| institution | Directory Open Access Journal |
| issn | 2498-700X |
| language | English |
| last_indexed | 2025-03-21T00:40:52Z |
| publishDate | 2019-03-01 |
| publisher | Faculty of Engineering, University of Debrecen |
| record_format | Article |
| series | International Journal of Engineering and Management Sciences |
| spelling | doaj.art-4bd9c71297f140bb906b89cca0ccc5832024-08-03T06:12:22ZengFaculty of Engineering, University of DebrecenInternational Journal of Engineering and Management Sciences2498-700X2019-03-014110.21791/IJEMS.2019.1.37.Effects of TIG Reheating on Duplex Stainless Steel Weld MicrostructureBalázs Varbai0https://orcid.org/0000-0003-0497-7292Ferenc Tolnai1Kornél Májlinger2https://orcid.org/0000-0002-6878-1611Budapest University of Technology and Economics, Department of Materials Science and EngineeringBudapest University of Technology and Economics, Department of Materials Science and EngineeringBudapest University of Technology and Economics, Department of Materials Science and Engineering Duplex stainless steels (DSS) gaining their excellent mechanical properties and corrosion resistance due to their austenitic-ferritic microstructure, ideally in the same amount. However, to keep this ideal phase ratio during arc welding is very difficult. Generally, the arc welding processes will result in more ferritic microstructure in the weld metal and in the heat affected zone, due to the rapid cooling. The ferritic microstructure can cause chromiumnitride precipitation, because the nitrogen solubility in ferrite phase is very low below 700 °C. These chromiumnitride precipitations can cause loss of corrosion resistance and mechanical properties. However, during subsequent reheating, the chromium-nitrides can dissolve and act as a secondary austenite nucleation site in the ferritic microstructure. In our research we welded DSS specimen autogenously, with tungsten inert gas welding using pure argon and 94 % argon + 6 % nitrogen as shielding gasses. In the first case the sub-sequent solid-state reheating caused 20 % increase in the austenite fraction of the weld metal but with the use of mixed shielding gas only 5 % increase. https://ojs.lib.unideb.hu/IJEMS/article/view/5237 |
| spellingShingle | Balázs Varbai Ferenc Tolnai Kornél Májlinger Effects of TIG Reheating on Duplex Stainless Steel Weld Microstructure International Journal of Engineering and Management Sciences |
| title | Effects of TIG Reheating on Duplex Stainless Steel Weld Microstructure |
| title_full | Effects of TIG Reheating on Duplex Stainless Steel Weld Microstructure |
| title_fullStr | Effects of TIG Reheating on Duplex Stainless Steel Weld Microstructure |
| title_full_unstemmed | Effects of TIG Reheating on Duplex Stainless Steel Weld Microstructure |
| title_short | Effects of TIG Reheating on Duplex Stainless Steel Weld Microstructure |
| title_sort | effects of tig reheating on duplex stainless steel weld microstructure |
| url | https://ojs.lib.unideb.hu/IJEMS/article/view/5237 |
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