Microstructure, plastic flow and fracture behavior of ferrite-austenite duplex low density medium Mn steel
| Autor: | Ian Zuazo, Quentin Tonizzo, Anne-Françoise Gourgues-Lorenzon, Astrid Perlade, Matthieu Mazière |
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| Přispěvatelé: | Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), ArcelorMittal R&D Automat, ArcelorMittal Maizières Research SA, ArcelorMittal-ArcelorMittal |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Charpy impact test Low density medium Mn Fracture mechanism 02 engineering and technology Plasticity 01 natural sciences Brittleness Duplex microstructure 0103 physical sciences Ultimate tensile strength Low density General Materials Science Composite material Cleavage 010302 applied physics Austenite Ductile damage Mechanical Engineering Metallurgy 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Mechanics of Materials Duplex (building) [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] 0210 nano-technology |
| Zdroj: | Materials Science and Engineering: A Materials Science and Engineering: A, Elsevier, 2017, 706, pp.217-226. ⟨10.1016/j.msea.2017.09.002⟩ |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2017.09.002 |
| Popis: | International audience; This study addresses the microstructure, plastic flow and fracture behavior of a laboratory Al-containing low density Fe-0.3C-6.7Mn-5.9Al medium Mn steel, intercritically annealed at either 850 °C or 900 °C, after cold rolling. Both resulting materials present an unordinary bimodal duplex microstructure made of coarse δ-ferrite grains and fine-grained (FG) {α-ferrite + retained austenite} regions. Tensile tests at room temperature and at −50 °C and Charpy impact tests showed that for both materials, each microstructural region presents its own fracture mechanisms and a specific ductile-to-brittle transition. A transition from brittle cleavage to ductile fracture is observed for coarse δ-ferrite grains, while FG regions present a transition from interfacial fracture to ductile fracture. The overall impact behavior seems to be driven by that of δ-ferrite grains. |
| Databáze: | OpenAIRE |
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