Effect of boron segregation on bainite nucleation during isothermal transformation
| العنوان: | Effect of boron segregation on bainite nucleation during isothermal transformation |
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| المؤلفون: | Josée Drillet, Philippe Maugis, G. Da Rosa, Khalid Hoummada, P. Douguet |
| المساهمون: | Aix-Marseille Université - Faculté des Sciences (AMU SCI), Aix Marseille Université (AMU), Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU), ArcelorMittal Maizières Research SA, ArcelorMittal |
| المصدر: | Scripta Materialia Scripta Materialia, 2022, 207, pp.114286. ⟨10.1016/J.SCRIPTAMAT.2021.114286⟩ Scripta Materialia, Elsevier, 2022, 207, pp.114286. ⟨10.1016/j.scriptamat.2021.114286⟩ Scripta Materialia, 2022, 207, pp.114286. ⟨10.1016/j.scriptamat.2021.114286⟩ |
| بيانات النشر: | HAL CCSD, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Materials science, Bainite, 0211 other engineering and technologies, Nucleation, chemistry.chemical_element, Thermodynamics, 02 engineering and technology, Atom probe, law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, Grain boundary segregation, law, General Materials Science, advanced highstrength steels, Boron, 021102 mining & metallurgy, Austenite, Mechanical Engineering, Metals and Alloys, [CHIM.MATE]Chemical Sciences/Material chemistry, Phase transformation kinetics, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Grain size, Atom probe tomography, chemistry, Isothermal transformation diagram, Mechanics of Materials, Bainitic steels, Grain boundary, 0210 nano-technology, Advanced high-strength steels |
| الوصف: | International audience; The effects of boron segregation and austenite grain size on the bainitic isothermal transformation of a high-strength steel were studied independently. Dilatometry, microstructural observations and previous atom probe tomography analyses showed that bainitic transformation rate decreases with increasing boron excess at austenite grain boundaries. We also found that boron segregation causes an unexpected grain size effect: large austenite grains transform faster than small ones. A kinetic model assuming slow nucleation at austenite triple junctions and rapid growth of bainitic nuclei successfully described our experimental data. These results confirm that bainite nucleation is inhibited by segregated boron at grain boundaries. On this basis, austenitic grain size could be optimized to make the most of boron addition in advanced high-strength steels. |
| اللغة: | English |
| تدمد: | 1359-6462 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b30b378c70b88bca8593651903a2b3b https://hal-amu.archives-ouvertes.fr/hal-04018882/document |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....3b30b378c70b88bca8593651903a2b3b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13596462 |
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