Damage development in low alloy TRIP-aided steels during air-bending
| Autor: | Delphine Reche, Anne-Françoise Gourgues-Lorenzon, A. Col, Olivier Bouaziz, T. Sturel |
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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 |
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Bending (metalworking) Fracture mechanisms Alloy Alloy steel Fractography 02 engineering and technology Plasticity engineering.material [SPI.MAT]Engineering Sciences [physics]/Materials Air-bending 0203 mechanical engineering Ferrite (iron) General Materials Science Microstructure Mechanical Engineering Metallurgy 021001 nanoscience & nanotechnology Condensed Matter Physics Ultra high strength steels Cracking 020303 mechanical engineering & transports Mechanics of Materials Martensite engineering 0210 nano-technology |
| Zdroj: | Materials Science and Engineering: A Materials Science and Engineering: A, Elsevier, 2011, 528, pp.5241-5250. ⟨10.1016/j.msea.2011.03.042⟩ |
| ISSN: | 0921-5093 |
| Popis: | International audience; In order to optimize the metallurgical quality of advanced high strength steels for automotive applications, the present study aims at understanding damage mechanisms involved in air-bending of two low alloy TRansformation Induced Plasticity (TRIP)-aided steels. Air-bending tests were performed together with metallographic investigations of damage development in bent specimens. In order to assess the role of hard bands induced by chemical segregations, air-bending tests on specimens with various locations of the main hard band (with respect to the neutral fibre) were performed. Cracking initiates from the outer surface or from just below, mainly by decohesion between ferrite and secondary (martensite) phases, at hard bands located close to the outer surface. From these examinations, together with a simple kinematics analysis of bending, a quantitative relationship between cracking, local thickness of hard band and local "mesoscopic" strain is proposed. |
| Databáze: | OpenAIRE |
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