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Reversible Characteristics and Cycling Effects of the ε ↔ γ Martensitic Transformations in Fe-Mn-Cr Twip/Trip Steels

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Abstract

The variation of thermal characteristics of the ε ↔ γ transformation during thermal cycling and the effect of Cr content was studied in two Fe-Mn-Cr steels through cyclic DSC examinations. It was found that the martensite start temperature decreased and the austenite start temperature increased in the first cycles, then both stabilized after several cycles. The latent heat of the transformations increased first and then also stabilized. The Cr content pushed the ε ↔ γ transformations to lower temperatures, decreased the thermal hysteresis and the latent heat. It is experimentally shown that 6.53 m/m% Cr content increases the stacking fault energy in this alloy.

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Acknowledgments

The research work was based on the results achieved within the TÁMOP-4.2.1.B-10/2/KONV-2010-0001 project and carried out as part of the OTKA K 84065 project.

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Authors and Affiliations

  1. Institute of Physical Metallurgy, Metalforming and Nanotechnology, University of Miskolc, Miskolc, Hungary

    V. Mertinger

  2. MTA-ME Material Science Research Group, Miskolc, Hungary

    M. Benke & E. Nagy

  3. Institute of Metallurgy and Foundry Engineering, University of Miskolc, Miskolc, Hungary

    T. Pataki

Authors
  1. V. Mertinger
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  2. M. Benke
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  3. E. Nagy
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  4. T. Pataki
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Corresponding authors

Correspondence to V. Mertinger or M. Benke.

Additional information

This article is an invited paper selected from presentations at the International Conference on Shape Memory and Superelastic Technologies 2013, held May 20-24, 2013, in Prague, Czech Republic, and has been expanded from the original presentation.

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Mertinger, V., Benke, M., Nagy, E. et al. Reversible Characteristics and Cycling Effects of the ε ↔ γ Martensitic Transformations in Fe-Mn-Cr Twip/Trip Steels. J. of Materi Eng and Perform 23, 2347–2350 (2014). https://doi.org/10.1007/s11665-014-1025-5

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  • DOI: https://doi.org/10.1007/s11665-014-1025-5

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