Effect of Nitrogen Addition to Shielding Gas on Cooling Rates and in the Microstructure of Thin Sheets of Duplex Stainless Steel Welded by Pulsed Gas Tungsten Arc Welding Process
| Autor: | Jesualdo Luiz Rossi, Temístocles de Sousa Luz, Marie-NoËlle Avettand-Fènoël, Evandro Giuseppe Betini, Marcos Tadeu D’Azeredo Orlando, Cristiano Stefano Mucsi, Maurilio Pereira Gomes |
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| Přispěvatelé: | Instituto de Pesquisas Energéticas e Nucleares [São Paulo] (IPEN/CNEN-SP), Universidade de São Paulo = University of São Paulo (USP)-Comissão National de Energia Nuclear (CNEN), Federal University of Espírito Santo, Unité Matériaux et Transformations - UMR 8207 (UMET), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lille, CNRS, INRA, ENSCL, Instituto de Pesquisas Energéticas e Nucleares [São Paulo] [IPEN/CNEN-SP], Unité Matériaux et Transformations - UMR 8207 [UMET], Comissão National de Energia Nuclear (CNEN)-Universidade de São Paulo (USP), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology Welding Duplex stainless steel cooling rates nitrogen GTAW thermal cycle microhardness 01 natural sciences Corrosion law.invention law 0103 physical sciences General Materials Science Materials of engineering and construction. Mechanics of materials 010302 applied physics Austenite Argon Mechanical Engineering Gas tungsten arc welding Shielding gas Metallurgy [CHIM.MATE]Chemical Sciences/Material chemistry Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure chemistry Mechanics of Materials [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] TA401-492 0210 nano-technology |
| Zdroj: | Materials Research, Vol 22, Iss suppl 1 (2019) Materials Research Materials Research, 2019, Materials Research, 22 (suppl 1), ⟨10.1590/1980-5373-mr-2019-0247⟩ Materials Research, Volume: 22 Supplement 1, Article number: e20190247, Published: 26 AUG 2019 Materials Research v.22 suppl.1 2019 Materials research (São Carlos. Online) Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
| ISSN: | 1516-1439 |
| DOI: | 10.1590/1980-5373-mr-2019-0247⟩ |
| Popis: | International audience; The effect of the nitrogen content in the shielding gas and its effect on temperature distributions at the welded zone of thin sheets of duplex stainless steel have been evaluated. The duplex stainless steels have many features due to unique microstructural combination of austenite and ferrite grains. The phase balance can be easily shifted depending on the welding parameters. Two sheets were welded using pure argon and pure argon plus 2% of nitrogen as shielding gas. The thermal profile had shown that N2-supplemented shielding gas lead to higher peaks of temperature using similar welding parameters. Microstructural examination showed that the austenite phase in the weld increased with the presence of nitrogen in the shielding gas. The added nitrogen promoted primary austenite formation and slightly increases the microhardness at the solidified zone. Microhardness mapping and metallographic imaging presented information about microstructures, confirming the formation of secondary phases during thermal cycle in the temperature range 850 °C and 950 °C. Control of ferrite amounts in the welds is essential mainly to improve mechanical properties and corrosion resistance of welding zones. |
| Databáze: | OpenAIRE |
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