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Revealing a Transformation-Induced Plasticity (TRIP) Phenomenon in a Medium-Entropy Alloy

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

A transformation-induced plasticity phenomenon in Fe65(CoCrMnNi)35 medium-entropy alloy was investigated. According to the X-ray diffraction patterns, the as-cast specimen contains a single-phase face-centered cubic (fcc), while low-temperature annealing at 500 °C and 600 °C leads to the introduction of a body-centered cubic (bcc) phase as a secondary phase. Further increment of the annealing temperature to above 700 °C eliminates the bcc phase, and the microstructure was found to contain a single-phase fcc. At 20% true strain, an fcc-to-bcc phase transformation is observed; whereas, at 28% true strain, an fcc-to-hcp phase transformation takes place as an additional deformation mechanism. This strain-induced phase transformation phenomenon leads to improved tensile properties of this alloy.

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Acknowledgements

This study was financially supported by the National Research Foundation of Korea (No. NRF-2015R1C1A1A01052856).

Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, Dedan Kimathi University of Technology, Private Bag-10143, Nyeri, Kenya

    Ibrahim Ondicho

  2. Materials, Design and Manufacturing (MADEMA) Group, Dedan Kimathi University of Technology, Private Bag-10143, Dedan Kimathi, Nyeri, Kenya

    Ibrahim Ondicho

  3. Department of Advanced Root Industry Engineering, Yuengnam University, Gyeongsan, South Korea

    Ibrahim Ondicho

  4. Department of Mining and Minerals Processing Engineering, Taita Taveta University, P.O. Box 635-80300, Voi, Kenya

    Bernard Alunda

  5. Department of Mechanical Engineering, Inha University, Incheon, South Korea

    Dicken Owino

  6. School of Mechanical Engineering, Kyungpook National University, Daegu, South Korea

    Luke Otieno

  7. Department of Mechanical Engineering, Howard University, Washington, DC, USA

    Melody Chepkoech

Authors
  1. Ibrahim Ondicho
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  2. Bernard Alunda
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  3. Dicken Owino
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  4. Luke Otieno
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  5. Melody Chepkoech
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Corresponding author

Correspondence to Ibrahim Ondicho.

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

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Ondicho, I., Alunda, B., Owino, D. et al. Revealing a Transformation-Induced Plasticity (TRIP) Phenomenon in a Medium-Entropy Alloy. Acta Metall. Sin. (Engl. Lett.) 33, 1159–1165 (2020). https://doi.org/10.1007/s40195-020-01088-y

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  • DOI: https://doi.org/10.1007/s40195-020-01088-y

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