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Superplastic Behavior in High-Pressure Torsion-Processed Mo7.5Fe55Co18Cr12.5Ni7 Medium-Entropy Alloy

  • Topical Collection: Innovations in High Entropy Alloys and Bulk Metallic Glasses
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Abstract

In the present study, superplasticity of high-pressure torsion-processed non-equiatomic Mo7.5Co18Cr12.5Fe55Ni7 medium-entropy alloy with nanograins was investigated. The superplastic elongation of 505 pct was achieved at a temperature of 800 °C and a low strain rate. The precipitation of the μ phase enriched with Mo hinders the grain boundary migration and also acts as the origin for cavity and crack formation.

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Acknowledgments

The authors acknowledge the financial support from the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) by the Ministry of Science and ICT (2016M3D1A1023384). The Korea Research Fellowship program also supports Dr. S. Praveen through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2017H1D3A1A01013666).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea

    Nhung Thi-Cam Nguyen, Peyman Asghari-Rad, Praveen Sathiyamoorthi & Hyoung Seop Kim

  2. Center for High Entropy Alloys, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea

    Nhung Thi-Cam Nguyen, Peyman Asghari-Rad, Praveen Sathiyamoorthi & Hyoung Seop Kim

  3. Max-Planck-Institut für Eisenforschung, Max-Planck-Straβe 1, 40237, Düsseldorf, Germany

    Jae Wung Bae

  4. Graduate Institute of Ferrous Technology, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea

    Hyoung Seop Kim

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  1. Nhung Thi-Cam Nguyen
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Correspondence to Hyoung Seop Kim.

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Manuscript submitted March 26, 2020, and accepted September 14, 2020.

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Nguyen, N.TC., Asghari-Rad, P., Bae, J.W. et al. Superplastic Behavior in High-Pressure Torsion-Processed Mo7.5Fe55Co18Cr12.5Ni7 Medium-Entropy Alloy. Metall Mater Trans A 52, 1–7 (2021). https://doi.org/10.1007/s11661-020-06033-3

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