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Deformation Mechanism in Fe61Mn18Si11Cr10 Medium Entropy Alloy Under Different Strain Rates

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

We introduce a non-equiatomic Fe61Mn18Si11Cr10 medium entropy alloy designed by subjecting it to transformation-induced plasticity upon deformation at room temperature. Microstructure characterization carried out using scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), transmission electron microscopy (TEM) and X-ray diffraction (XRD) shows a homogeneous solid solution FCC + BCC structured dual phase. Investigations on the deformation substructures at specific strain levels via EBSD reveal the deformation-induced transformations of γ → α′ and γ → ɛ. The strengths, particularly yield strength, of the designed alloy are found to be higher than these of the well-studied five component FeMnNiCoCr system for the introduction of the hard phase (α′-martensite). When tensile tests are performed at different strain rates of 10–4 s−1, 10–3 s−1, 10–2 s−1, the tested material exhibits a slightly negative strain rate sensitivity and work hardening rate sensitivity.

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Acknowledgement

This work was financially supported by the Fundamental Research Funds for the Central Universities (No. 2020MS058).

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Authors and Affiliations

  1. Institute of Advanced Materials, North China Electric Power University, Beijing, 102206, China

    Shaoheng Sun, Zhiyong Xue & Jiankun Lin

  2. Institute of Engineering Technology, University of Science and Technology Beijing, Beijing, 100083, China

    Yun Zhang

  3. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Xiaohua Chen

Authors
  1. Shaoheng Sun
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  2. Yun Zhang
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  3. Zhiyong Xue
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  4. Jiankun Lin
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Correspondence to Shaoheng Sun or Zhiyong Xue.

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Available online at http://link.springer.com/journal/40195.

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Sun, S., Zhang, Y., Xue, Z. et al. Deformation Mechanism in Fe61Mn18Si11Cr10 Medium Entropy Alloy Under Different Strain Rates. Acta Metall. Sin. (Engl. Lett.) 34, 1109–1119 (2021). https://doi.org/10.1007/s40195-021-01222-4

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  • DOI: https://doi.org/10.1007/s40195-021-01222-4

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