Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless Steel
The size evolution of niobium carbonitrides Nb(C,N) and the evolution of the composition of an austenitic matrix in 316Nb stainless steel were simulated using DICTRA software. For the first time, the complete nine-element composition of steel was taken into account during isothermal and even anisoth...
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MDPI AG
2021-04-01
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| author | Nicolas Cliche Sylvain Ringeval Philippe Petit Jacques Bellus Eric Georges François Cortial Jean-Loup Heuzé Anne-Françoise Gourgues-Lorenzon Vladimir A. Esin |
| author_facet | Nicolas Cliche Sylvain Ringeval Philippe Petit Jacques Bellus Eric Georges François Cortial Jean-Loup Heuzé Anne-Françoise Gourgues-Lorenzon Vladimir A. Esin |
| author_sort | Nicolas Cliche |
| collection | DOAJ |
| description | The size evolution of niobium carbonitrides Nb(C,N) and the evolution of the composition of an austenitic matrix in 316Nb stainless steel were simulated using DICTRA software. For the first time, the complete nine-element composition of steel was taken into account during isothermal and even anisothermal heat treatments. A reduced model was then proposed to optimize the calculation time for complex heat treatments. The change in the mean Nb content in austenite due to Nb(C,N) evolution during different heat treatments was studied. It qualitatively agrees with experimental data as obtained by electron probe microanalysis. Furthermore, the model was successfully applied to explain the effect of heat treatments on the recrystallization behavior of 316Nb steel during hot torsion tests. Moreover, the effect of the thermodynamic database and the number of alloying elements chosen was discussed. We showed that taking into account seven or even nine elements greatly improves the accuracy compared to usual simplified compositions. The proposed method can be useful in designing heat treatments promoting or conversely hindering recrystallization for a wide variety of Nb-bearing steels. |
| first_indexed | 2024-03-10T11:55:07Z |
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| id | doaj.art-7c0ed5732fcc4cbda49fe7f9b7755efe |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T11:55:07Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-7c0ed5732fcc4cbda49fe7f9b7755efe2023-11-21T17:24:34ZengMDPI AGMetals2075-47012021-04-0111571510.3390/met11050715Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless SteelNicolas Cliche0Sylvain Ringeval1Philippe Petit2Jacques Bellus3Eric Georges4François Cortial5Jean-Loup Heuzé6Anne-Françoise Gourgues-Lorenzon7Vladimir A. Esin8Centre des Matériaux (UMR CNRS 7633), MINES ParisTech, PSL University, 91003 Évry, FranceCentre de Valduc, Commissariat à L’Énergie Atomique et Aux Énergies Alternatives, 21120 Is-sur-Tille, FranceAubert & Duval, 63770 Les Ancizes, FranceAubert & Duval, 63770 Les Ancizes, FranceAubert & Duval, 63770 Les Ancizes, FranceNaval Group Research, 44340 Bouguenais, FranceDirection Générale de L’Armement, Ministère des Armées, 75509 Paris, FranceCentre des Matériaux (UMR CNRS 7633), MINES ParisTech, PSL University, 91003 Évry, FranceCentre des Matériaux (UMR CNRS 7633), MINES ParisTech, PSL University, 91003 Évry, FranceThe size evolution of niobium carbonitrides Nb(C,N) and the evolution of the composition of an austenitic matrix in 316Nb stainless steel were simulated using DICTRA software. For the first time, the complete nine-element composition of steel was taken into account during isothermal and even anisothermal heat treatments. A reduced model was then proposed to optimize the calculation time for complex heat treatments. The change in the mean Nb content in austenite due to Nb(C,N) evolution during different heat treatments was studied. It qualitatively agrees with experimental data as obtained by electron probe microanalysis. Furthermore, the model was successfully applied to explain the effect of heat treatments on the recrystallization behavior of 316Nb steel during hot torsion tests. Moreover, the effect of the thermodynamic database and the number of alloying elements chosen was discussed. We showed that taking into account seven or even nine elements greatly improves the accuracy compared to usual simplified compositions. The proposed method can be useful in designing heat treatments promoting or conversely hindering recrystallization for a wide variety of Nb-bearing steels.https://www.mdpi.com/2075-4701/11/5/715austenitic stainless steelrecrystallizationniobiumthermokinetic modellingDICTRA |
| spellingShingle | Nicolas Cliche Sylvain Ringeval Philippe Petit Jacques Bellus Eric Georges François Cortial Jean-Loup Heuzé Anne-Françoise Gourgues-Lorenzon Vladimir A. Esin Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless Steel Metals austenitic stainless steel recrystallization niobium thermokinetic modelling DICTRA |
| title | Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless Steel |
| title_full | Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless Steel |
| title_fullStr | Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless Steel |
| title_full_unstemmed | Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless Steel |
| title_short | Thermokinetic Modelling of High-Temperature Evolution of Primary Nb(C,N) in Austenite Applied to Recrystallization of 316Nb Austenitic Stainless Steel |
| title_sort | thermokinetic modelling of high temperature evolution of primary nb c n in austenite applied to recrystallization of 316nb austenitic stainless steel |
| topic | austenitic stainless steel recrystallization niobium thermokinetic modelling DICTRA |
| url | https://www.mdpi.com/2075-4701/11/5/715 |
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