Abstract
Fe-22 wt pct Mn-0.6 wt pct C twinning-induced plasticity (TWIP) steel having fully recrystallized ultrafine-grained structure was obtained through a simple thermomechanical process repeating cold rolling and annealing. The minimum average grain size of 550 nm was successfully obtained. The ultrafine-grained steel exhibited good mechanical properties superior to those previously reported in Fe-Mn-Al-Si TWIP steels, and the origin was discussed based on the difference of stacking fault energies.
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Y.Z.T. gratefully acknowledges the support of the Japan Society for the Promotion of Science (JSPS) for awarding a postdoctoral fellowship. This work was financially supported by the Grant-in-Aids for Scientific Research on Innovative Area “Bulk Nanostructured Metals” (Area No. 2201), for Scientific Research (A) (No. 24246114) and for Challenging Exploratory Research (No. 25600039), and the Elements Strategy Initiative for Structural Materials (ESISM), all through the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.
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Manuscript submitted July 14, 2014.
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Tian, Y.Z., Bai, Y., Chen, M.C. et al. Enhanced Strength and Ductility in an Ultrafine-Grained Fe-22Mn-0.6C Austenitic Steel Having Fully Recrystallized Structure. Metall Mater Trans A 45, 5300–5304 (2014). https://doi.org/10.1007/s11661-014-2552-2
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DOI: https://doi.org/10.1007/s11661-014-2552-2