Abstract
In this work, the texture evolution, mechanical properties, and formability of cold-rolled lightweight steel annealed at 500, 600, 700, and 800 °C for 30 min were investigated. The phases in the annealed specimens mainly included ferrite, austenite, and martensite. The retained austenite showed a trend of increasing and then decreasing with the increase in annealing temperature. At the annealing temperature of 700 °C, the retained austenite content reached the maximum value of 53.0%, resulting in a large amount of martensitic TRIP effect during the subsequent deformation. So the steel obtained the optimal mechanical properties with the ultimate tensile strength of 1613 MPa, ultimate elongation of 30.2%, and largest product of strength and ductility of 48.7GPa%. In addition, the annealing temperature of 700 °C was conducive to the stamping texture of {111} < 110> orientation, as well as higher strength, and the plastic strain ratio (r), the strain hardening index (n), and the flexural strength ratio (ReL/Rm) were 1.25, 0.55, and 0.41, respectively, the material obtained excellent formability.
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Acknowledgments
The authors gratefully acknowledge Anhui Provincial Natural Science Foundation (No. 2108085ME143), and Anhui Provincial Universities Natural Science Research Project (No. KJ2021ZD0045).
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Lin, Fm., Wu, Xj., Zhang, Xf. et al. Texture, Mechanical Properties, and Formability of a Lightweight Steel during Cold Rolling and Annealing. J. of Materi Eng and Perform (2023). https://doi.org/10.1007/s11665-023-08665-z
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DOI: https://doi.org/10.1007/s11665-023-08665-z