Title: Study and modelling of microstructural evolutions and thermomechanical behaviour during the tempering of steel

Authors: Yunning Wang, Benoit Appolaire, Sabine Denis, Pierre Archambault, Bernard Dussoubs

Addresses: LSG2M, UMR 7584 CNR-INPL-UHP, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy, France. ' LSG2M, UMR 7584 CNR-INPL-UHP, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy, France. ' LSG2M, UMR 7584 CNR-INPL-UHP, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy, France. ' LSG2M, UMR 7584 CNR-INPL-UHP, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy, France. ' LSG2M, UMR 7584 CNR-INPL-UHP, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy, France

Abstract: A model for the evolution of microstructures and flow stress during the tempering of low alloyed steels has been developed. The competitive precipitations of ε carbide and cementite are simulated. The results are used to calculate the flow stress of the tempered martensite by a thermo-elasto-viscoplastic law that takes into account solid solution, dislocation and precipitation hardenings. The model is applied to a 80MnCr5 steel and the calculated results are compared with the experimental ones.

Keywords: tempering; ε carbide; cementite; precipitation; thermomechanical behaviour; microstructure; low alloy steels; flow stress; tempered martensite; solid solution; dislocation; precipitation hardening.

DOI: 10.1504/IJMMP.2006.010626

International Journal of Microstructure and Materials Properties, 2006 Vol.1 No.2, pp.197 - 207

Published online: 09 Aug 2006 *

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