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Article Dans Une Revue Scripta Materialia Année : 2016

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

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Résumé

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.
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Dates et versions

hal-01337970 , version 1 (27-06-2016)

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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, 2016, 120, pp.98-102. ⟨10.1016/j.scriptamat.2016.04.011⟩. ⟨hal-01337970⟩
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