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On the Austenite Stability of a New Quality of Twinning Induced Plasticity Steel, Exploring New Ranges of Mn and C

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Abstract

A new high-manganese, low-silicon TWIP steel was studied to evaluate austenite stability after different heat treatment conditions. To determine the phase transformations, dilatometric experiments were performed, and the microstructure was characterized by light optical microscopy, X-ray diffraction, and transmission electron microscopy. Precipitation of lamellar cementite was observed in the microstructure for extended treatment times at 823 K (550 °C). Long isothermal holding at this temperature also caused epsilon martensite formation during cooling, resulting from a decrease in austenite stability due to carbon depletion in the matrix when a quantifiable amount of cementite is formed.

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The financial support by the Austrian Forschungsförderungsgesellschaft GmbH Research Program, under project number 823398, is gratefully acknowledged. The authors thank Voestalpine Stahl GmbH of Linz in Austria for providing materials and the support of the research center. R.A. Mesquita also thanks CNPq for providing financial support and his research scholarship.

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Authors and Affiliations

  1. Department of Industrial Engineering, Universidade Nove de Julho, Av. Francisco Matarazzo 612, São Paulo, SP, 05001-100, Brazil

    Rafael Agnelli Mesquita (Professor)

  2. University of Applied Sciences Upper Austria, Wels, Austria

    Reinhold Schneider (Professor) & Katharina Steineder (Student)

  3. voestalpine Stahl GmbH, Linz, Austria

    Ludovic Samek (Researcher) & Enno Arenholz (Head of Research)

Authors
  1. Rafael Agnelli Mesquita
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  2. Reinhold Schneider
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  3. Katharina Steineder
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  4. Ludovic Samek
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  5. Enno Arenholz
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Corresponding author

Correspondence to Rafael Agnelli Mesquita.

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Manuscript submitted November 17, 2012.

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Mesquita, R.A., Schneider, R., Steineder, K. et al. On the Austenite Stability of a New Quality of Twinning Induced Plasticity Steel, Exploring New Ranges of Mn and C. Metall Mater Trans A 44, 4015–4019 (2013). https://doi.org/10.1007/s11661-013-1741-8

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