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Article Dans Une Revue Mechanics of Materials Année : 2014

Variation in electric resistivity in metastable alloys during thermomechanical loading : effects of temperature, elasticity, plasticity and phase transformation

Luc Saint-Sulpice
MMA
Mohamed Lakrit
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MMA
Shabnam Arbab-Chirani
MMA
Sylvain Calloch
MMA

Résumé

301L metastable stainless steel is a ductile material in which there is strong coupling between plasticity and phase transformation, leading to strongly non-linear thermomechanical behaviour. To determine phase transformation kinetics, isothermal tensile tests at different temperatures were carried out and in situ voltage (electric resistance) was measured. We then chose an appropriate post-processing method based on observed voltage using strain and temperature. It was thus possible to determine the effect of temperature, elasticity, plasticity and phase transformation on the electric resistivity of the studied material. After identifying the effect of each strain mechanism, a volume phase fraction determination method based on electric resistivity variation was developed and used to determine the kinetics of phase transformation. Finally, we compared our results with those of two classic methods: the neutron diffraction method and the magnetic method.
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Dates et versions

hal-00949685 , version 1 (20-02-2014)

Identifiants

Citer

Luc Saint-Sulpice, Mohamed Lakrit, Shabnam Arbab-Chirani, Sylvain Calloch. Variation in electric resistivity in metastable alloys during thermomechanical loading : effects of temperature, elasticity, plasticity and phase transformation. Mechanics of Materials, 2014, 71, pp.1-9. ⟨10.1016/j.mechmat.2014.01.004⟩. ⟨hal-00949685⟩
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