Abstract
Hot-rolled Nb-stabilized ferritic stainless steel samples were produced with and without annealing. The samples were then cold rolled and isothermally annealed at 650–1000 °C for 10–14,400 s. The recrystallized volume fraction was quantified using the Johnson–Mehl–Avrami–Kolmogorov model and by measuring the microhardness of samples annealed for various duration. The texture evolution was analyzed using electron backscatter diffraction. The calculated Avrami exponents were between 0.8 and 1.2. The intensity of the {111}〈121〉 and {111}〈011〉 components of the γ-fiber increased and the deformation texture seen in the α-fiber decreased with increasing annealing time. The intensity of the rotated-cube component decreased with increasing annealing time. The intensity distributions of the early nucleation and full recrystallization textures were noticeably different. The {554}〈225〉 texture component, which was associated with the largest grains, appeared during the late stages of recrystallization. The final annealing led to a grain refinement with a final average grain diameter of 8 µm.
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ACKNOWLEDGMENTS
The authors thank CAPES-PROEX, FAPEMIG and CNPq for research fellowships and masters made available to students and for their financial support. We also thank the company Aperam South America SA for providing the ferritic stainless steel samples.
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Malta, P.O., Gonçalves, C.M., Alves, D.S. et al. The influence of hot band annealing on recrystallization kinetics and texture evolution in a cold-rolled Nb-stabilized ferritic stainless steel during isothermal annealing. Journal of Materials Research 31, 2838–2849 (2016). https://doi.org/10.1557/jmr.2016.296
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DOI: https://doi.org/10.1557/jmr.2016.296