Mod\'elisation multidomaine du comportement magn\'eto-m\'ecanique des aciers dual-phases

TL;DR

This paper develops a multidomain magneto-mechanical model for dual-phase steels, capturing the microstructure's influence on magnetic and mechanical behavior under stress, aiding in online process control.

Contribution

It introduces a coupled magneto-mechanical model for dual-phase steels considering microstructure and stress effects, with validation through experiments.

Findings

Model accurately predicts magnetic response under stress.

Simulation aligns with experimental measurements.

Provides a basis for online magnetic control of steel processing.

Abstract

The microstructure and mechanical behavior of dual-phase steels are highly sensitive to the variation of the process (heat treatments). Online control by magnetic method is relevant. A measurement under applied stress must be considered. The dual-phase is a two-phase medium (ferrite / martensite). Each phase can be considered as a sphere embedded in a homogeneous equivalent medium. The model used for each phase is based on a magneto-mechanical coupled model. This is an explicit single crystalline model representative of the behavior of the corresponding phase. Localization rules allow the simulation of the two-phases medium. Experiments and modeling are compared.