Influence of carbon content on the primary solidification mode of high strength steels in resistance spot welding conditions

Florent Krajcarz 1, 2 Anne-Françoise Gourgues-Lorenzon 1 Emmanuel Lucas 2
1 MAT - Centre des Matériaux
2 ArcelorMittal
Abstract : The primary solidification mode of resistance spot welds made of advanced high strength steels has been investigated as a function of carbon content. Electron backscatter diffraction and dendrite morphology analysis showed for the first time a transition from primary solidification into δ-ferrite (C ≤ 0.22 wt%) to primary solidification into austenite (C ≥ 0.29 wt%) with increasing carbon content. The description of this transition by using the so-called “interface response function” model is not fully satisfactory and strongly depends on input model parameters. Epitaxial growth from the heat-affected zone or from the slowly solidified zone could influence the solidification path.
Keywords : Thermokinetic modelling Solidification microstructure Rapid solidification Advanced high strength steels Welding
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Article dans une revue
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01337970
Contributeur : Bibliothèque Umr7633 <>
Soumis le : lundi 27 juin 2016 - 16:10:27
Dernière modification le : dimanche 26 janvier 2020 - 01:09:24

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Florent Krajcarz, Anne-Françoise Gourgues-Lorenzon, Emmanuel Lucas. Influence of carbon content on the primary solidification mode of high strength steels in resistance spot welding conditions. Scripta Materialia, Elsevier, 2016, 120, pp.98-102. ⟨10.1016/j.scriptamat.2016.04.011⟩. ⟨hal-01337970⟩

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