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Effect of cold rolling on texture evolution duringprimary recrystallization of an IF steel

Auteurs : A. Ayad, N. Rouag, M. Ramoul
Année : 2016
Domaine : Sciences des matériaux
Type : Communication
Conférence: 7th African Conference on Non Destructive Testing ACNDT 2016 & the 5th International Conference on NDT and Materials Industry and Alloys (IC-WNDT-MI)
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : IF steel, Cold rolling, primary recrystallization, texture, XRD, -fiber, -fiber.

Résumé :

In the present study, we present the effect of cold rolling on texture evolution during primary recrystallization of an IF steelthat is destined to the automotive industry. From the hot rolled sheet, three deformation rates were performed by cold rolling: 25, 50and 75 % followed by several heat treatments in order to obtain the fully recrystallized states. Microhardness Vichers was used toestimate the recrystallized fraction and XRD (X-ray diffraction)for the texture characterization. The results show that texture of thehot rolled sample is near random and its evolution is very low for the 25% reduced sample. However, texture become more importantfor 50% and 75% reduces states, with the strengthening of -fiber and the appearance of -fiber. The evolution of texture duringprimary recrystallization is quite different. Recrystallization of the 25% and 50% cold rolled states shows a maximum of the ODF on{223}<110> component and texture tends generally to be random. The recrystallization texture of the 75% reduced sample ischaracterized by a -fiber more intense than - fiber and a maximum of the ODF around the component {111}<110>. It was observedalso that -fiber starts to develop during the primary recrystallization of the 50% rolled state, and becomes more pronounced duringrecrystallization of the 75% cold rolled sample.