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Two-Step Intercritical Annealing to Eliminate Lüders Band in a Strong and Ductile Medium Mn Steel

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Abstract

Lüders band usually apprears in medium Mn steel, and they are difficult to be eliminated without sacrificing the mechanical properties. In this study, a tailored two-step intercritical annealing approach is proposed to eliminate Lüders band and maintain excellent mechanical behavior. A strong ferritic matrix and austenite with appropriate stability are obtained, achieving excellent mechanical behavior. Lüders band is fully removed by the early stress-induced martensitic transformation.

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YS acknowledges the support from the National Natural Science Foundation of China (Project Nos. 51471107 and 51671132). JM acknowledges Haiting Liu, Ao Tang from Shanghai Jiao Tong University and Jiachen Pang from General Motors China Science Lab for help with experiments.

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Correspondence to Qi Lu or Yao Shen.

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Manuscript submitted March 16, 2018.

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Ma, J., Lu, Q., Sun, L. et al. Two-Step Intercritical Annealing to Eliminate Lüders Band in a Strong and Ductile Medium Mn Steel. Metall Mater Trans A 49, 4404–4408 (2018). https://doi.org/10.1007/s11661-018-4791-0

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  • DOI: https://doi.org/10.1007/s11661-018-4791-0

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