Experimental analysis of the correlation between martensitic transformation plasticity and the austenitic grain size in steels |
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| Authors: | A Boudiaf L Taleb MA Belouchrani |
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| Institution: | 1. Groupe de Physique des Matériaux, UMR CNRS 6634 INSA et Université de Rouen, Avenue de l’Université – BP 08 – 76800, St Etienne du Rouvray, France;2. Laboratoire Génie des Matériaux, Ecole Militaire Polytechnique, BP 17 Bordj El-Bahri Alger, Algeria;1. Materials and Mechanical Engineering, Centre for Advanced Steels Research, University of Oulu, University of Oulu, P.O. Box 4200, FI-90014, Finland;2. SSAB Europe, Raahe Mill, Finland;1. CEMDRX Department of Physics, University of Coimbra, Rua Larga, P-3004-516 Coimbra, Portugal;2. AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. A. Mickiewicza 30, PL-30-059 Krakow, Poland |
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| Abstract: | This work investigates the effect of the Austenite Grain Size (AGS) on the thermo-mechanical behavior of 35NiCrMo16 steel during the martensitic transformation under complex loading. Particularly in view of some thermal cycles, we analyzed the evolution of the austenite grain size under different austenitizing conditions. Using the same temperature-holding time parameters, we performed a series of experiments to assess the Transformation-Induced Plasticity (TRIP) under uniaxial (tension or torsion) and biaxial (tension + torsion) loading. The results suggest that the uniaxial torsion loading case, Transformation-Induced Plasticity does not depend on the prior Austenite Grain Size (AGS) whereas, in the uniaxial tension loading case, it is a “slightly” increasing function of the AGS. |
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