Elsevier

Scripta Materialia

Volume 207, 15 January 2022, 114239
Scripta Materialia

Deformation-induced grain boundary segregation mediated high-strain rate superplasticity in medium entropy alloy

https://doi.org/10.1016/j.scriptamat.2021.114239Get rights and content

Abstract

Superplasticity refers to extremely high plastic deformation of crystalline materials at homologous temperature. In particular, high-strain rate superplasticity (HSRS) at a strain rate equal to or higher than 10−2 s−1 draws great technological interest in the shape-forming of engineering materials. Besides primary mechanism as grain boundary sliding, the formation of liquid phase at grain boundaries/interfaces can assist HSRS. With the advent of multi-principle element alloys (MPEAs), designing grain boundary segregation of a low melting temperature element with the appropriate choice of composition can bring the possibility to produce the HSRS accommodated by the partial melting in MPEAs. Here, we show the trace of the liquid phase in Al0.3CoCrNi MPEA at the homologous temperature of 0.65. Careful microstructural examination reveals for the first time that deformation-induced Al-segregation occurs at grain boundaries/interfaces. The present work expedites a new path to tailoring microstructure for promoting the HSRS in high-strength materials by grain boundary segregation engineering.

Section snippets

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Acknowledgments

This investigation was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2021R1A2C3006662) and the Future Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT of Korea (NRF-2016M3D1A1023383). Dr. P. Sathiyamoorthi was funded by the Korea Research Fellowship program through the National Research Foundation of Korea (NRF) sponsored by the Ministry of Science and ICT

Author Contributions

P. Asghari-Rad and N.T-C. Nguyen conceived the idea for investigation and contributed equally to this work. P. Asghari-Rad conducted the sample preparation for superplastic tests (casting, rolling, and HPT), performed the microstructural analysis using TEM and BSE, and contributed to the writing and discussion part. N.T-C. Nguyen is the scientific administrator of this study, performed tensile experiments, processed data, and wrote the manuscript. A. Zargaran contributed to the discussion part

Data and materials availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

References (46)

  • K. Biswas et al.

    J.Th.M. DeHosson, Scr. Mater.

    (2020)
  • Y. Zhang et al.

    Prog. Mater. Sci.

    (2014)
  • P. Asghari-Rad et al.

    Scr. Mater.

    (2021)
  • I. Basu et al.

    Scr. Mater.

    (2020)
  • P. Sharma et al.

    Mater. Today Proc.

    (2021)
  • Y. Huang et al.

    Mater. Today

    (2013)
  • M. Mabuchi et al.

    Acta Mater

    (1999)
  • Y. Takayama et al.

    Acta Mater

    (1999)
  • J. Koike et al.

    Acta Metall. Mater.

    (1995)
  • Z.-M. Hua et al.

    Materialia

    (2020)
  • P. Sathiyamoorthi et al.

    Mater. Sci. Eng. A

    (2019)
  • M.P. Agustianingrum et al.

    J. Alloys Compd.

    (2019)
  • D. Lee et al.

    Mater. Lett.

    (2019)
  • P. Sathiyamoorthi et al.

    Materialia

    (2019)
  • S. Lee et al.

    Acta Mater

    (2002)
  • M. Furukawa et al.

    Acta Mater

    (2001)
  • S.-H. Song et al.

    Mater. Sci. Eng. A

    (2008)
  • D.A. Basha et al.

    Mater. Sci. Eng. A

    (2017)
  • P. Doig et al.

    Acta Metall

    (1981)
  • X.-M. Chen et al.

    Mater. Sci. Eng. A

    (2011)
  • G.W. Hu et al.

    J. Mater. Sci. Tech.

    (2020)
  • C. Wolverton

    Acta Mater

    (2007)
  • X. Sauvage et al.

    Acta Mater

    (2014)
  • Cited by (34)

    • Creep-induced redistribution of alloying elements in CZ1 zirconium alloys

      2024, Journal of Materials Science and Technology
    View all citing articles on Scopus
    1

    These authors contributed equally: Peyman Asghari-Rad, Nhung Thi-Cam Nguyen.

    View full text