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Microstructure and self-heating for ferritic steels undercyclic loading at low stress magnitudes*

Published online by Cambridge University Press:  26 March 2010

V. Favier,
C. Mareau,
A. Galtier,
B. Weber and
M. Berveiller
V. Favier
Affiliation:
Arts et Métiers ParisTech, CNRS, LIM, 151 Bd de l’Hôpital, 75013 Paris, France
C. Mareau
Affiliation:
Arts et Métiers ParisTech, CNRS, LPMM, 4 Rue Augustin Fresnel, 57078 Metz Cedex 3, France
A. Galtier
Affiliation:
CETIM, 52 Av. Félix-Louat, 60304 Senlis Cedex, France
B. Weber
Affiliation:
ArcelorMittal Maizières Research and Development, Voie Romaine, 57280 Maizières-lès-Metz, France
M. Berveiller
Affiliation:
Arts et Métiers ParisTech, CNRS, LPMM, 4 Rue Augustin Fresnel, 57078 Metz Cedex 3, France
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Abstract

A new micromechanical modelling is proposed to correlate some microstructural parametersand dissipation in ferritic steels under cyclic loading. We assumed the occurrence of twodissipative mechanisms associated with anelastic and inelastic deformations, respectively.We showed that the modelling provides good qualitative prediction of the heating curveswhen changing the volume fraction of precipitates in ferritic steels. We highlighted thekey role of the dispersion of the grain size on the local and global dissipation.

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