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Article Dans Une Revue Materials Science and Technology Année : 2018

Time-evolution of microstructure and mechanical behaviour of double annealed medium Mn steel

Résumé

Cold rolled 0.1C-4.7Mn (wt-%) steel was submitted to double annealing. The holding time of second intercritical annealing at 650°C was varied between 3 min and 30 h. Tensile behavior after each treatment was measured and analysed. Microstructure characterisation was performed using field emission gun scanning electron microscope, transmission electron microscope and saturation magnetisation method. Moreover, interrupted tensile tests were done to obtain the kinetics of austenite destabilisation during straining. An important effect of soaking time on the microstructure and associate mechanical properties was revealed and analysed. Considering thermal and mechanical stability of retained austenite, the optimum combination of phases, providing the best strength-ductility balance, was found after 2 h holding.
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hal-02903181 , version 1 (20-07-2020)

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Artem Arlazarov, Mohamed Goune, Olivier Bouaziz, Frédéric Kegel, Alain Hazotte. Time-evolution of microstructure and mechanical behaviour of double annealed medium Mn steel. Materials Science and Technology, 2018, 35 (17), pp.2076-2083. ⟨10.1080/02670836.2019.1585031⟩. ⟨hal-02903181⟩
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