Recrystallization Kinetics and Texture Evolution of Nb Stabilized Ferritic 430 Stainless Steel Cold Rolled and Isothermal Annealed

Paula Oliveira Malta; Iane Dutra Moutinho; Davi Silva Alves; Aline Vasconcelos Ferreira; Dagoberto Brandão Santos

doi:10.4028/www.scientific.net/MSF.879.1656

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HomeMaterials Science ForumMaterials Science Forum Vol. 879Recrystallization Kinetics and Texture Evolution...

Recrystallization Kinetics and Texture Evolution of Nb Stabilized Ferritic 430 Stainless Steel Cold Rolled and Isothermal Annealed

Abstract:

The ferritic stainless steel type 430 stabilized with Nb, with and without annealing after hot rolling, was cold rolled and subjected to isothermal annealing at temperatures 650, 700 and 750°C for times ranging between 10 to 86400 s. The recrystallization kinetics was evaluated by JMAK model through microhardness measurements and KAM and GOS parameters. The Avrami exponent data indicate the occurrence of an unidimensional grain growth due only to high angle boundaries migration, with values ranging between 0.9 and 1.2. The nucleation rate and grain growth decreased continuously with time. The evolution of the texture was analyzed via EBSD analysis by ODF maps. The steel recrystallization is based on combination of ON and SG theories, due to presence of {111}<121>, {554}<225> and {111}<112> related to γ fiber. The rotated cube component, feature of the hot rolled steel, decreased with annealing time.