Effect of B and B + Nb on the bainitic transformation in low carbon steels

KANGYING, ZHU ; OBERBILLIG, Carla ; et al.

In: Materials science & engineering. A, Structural materials : properties, microstructure and processing, Jg. 528 (2011), Heft 12, S. 4222-4231

academicJournal - print, 37 ref

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Development of new, advanced high and ultra-high strength bainitic steels requires the selection of the optimum balance of bainite promoting elements allowing the production of the desired bainitic microstructure over a wide range of cooling rates. The addition of boron or a combined addition of boron and niobium is well known to retard strongly the polygonal ferrite formation but very little knowledge has been acquired on the bainitic transformation. Therefore, the purpose of this study is to investigate the influence of boron and boron plus niobium on the bainite transformation kinetics, microstructural evolution and mechanical properties in a low carbon steel (Fe―0.05C―1.49Mn―0.30Si). Isothermal and continuous cooling transformation diagrams were determined and followed by a detailed quantitative characterisation of the bainite microstructure and morphology using complementary advanced metallographic techniques (FEG-SEM-EBSD, SIMS and TEM). The relationship between microstructure and hardness has been evaluated. Finally, results of SIMS and TEM analyses coupled with microstructural investigations enable to propose a mechanism to explain the effect of the synergy between boron and niobium on the bainitic transformation and the resultant microstructure.

Titel:	Effect of B and B + Nb on the bainitic transformation in low carbon steels
Autor/in / Beteiligte Person:	KANGYING, ZHU ; OBERBILLIG, Carla ; MUSIK, Céline ; LOISON, Didier ; LUNG, Thierry
Link:	E-Journal im Bestand der UB Hagen? View record from PASCAL Archive
Zeitschrift:	Materials science & engineering. A, Structural materials : properties, microstructure and processing, Jg. 528 (2011), Heft 12, S. 4222-4231
Veröffentlichung:	Kidlington: Elsevier, 2011
Medientyp:	academicJournal
Umfang:	print, 37 ref
ISSN:	0921-5093 (print)
Schlagwort:	Crystallography Cristallographie cristallogenèse Chemical industry parachemical industry Industrie chimique et parachimique Metallurgy, welding Métallurgie, soudage Condensed state physics Physique de l'état condensé Sciences exactes et technologie Exact sciences and technology Physique Physics Domaines interdisciplinaires: science des materiaux; rheologie Cross-disciplinary physics: materials science; rheology Science des matériaux Materials science Diagrammes de phases et microstructures développées par solidification et par transformations de phases solide-solide Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Transformations de phases solide-solide à composition constante: polymorphes, massives, ordre-désordre Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder Acier bas carbone Low carbon steel Acero bajo carbono Acier haute résistance High-strength steels Addition bore Boron additions Addition niobium Niobium additions Cinétique Kinetics Courbe TRC CCT curve Curva TRC Diffraction électron rétrodiffusé EBSD Désorientation grain High angle grain boundary Límite intergranular gran ángulo Microscopie électronique balayage Scanning electron microscopy Microscopie électronique transmission Transmission electron microscopy Microstructure Métal transition Transition elements Métallographie Metallography Spectre SIMS Secondary ion mass spectra Transformation bainitique Bainitic transformation Transformación bainítica Vitesse refroidissement Cooling rate Bainite transformation kinetics Boron effect Mechanical properties
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Article File Description: text Language: English Author Affiliations: ArcelorMittal Maizieres, Research and Development, BP 30320, 57283 Maizières-lès-Metz, France Rights: Copyright 2015 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Physics and materials science

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