Small-Scale Plastic Deformation of Nanocrystalline High Entropy Alloy

Sanghita Mridha; Mageshwari Komarasamy; Sanjit Bhowmick; Rajiv  S. Mishra; Sundeep Mukherjee

doi:10.3390/e20110889

Entropy (Nov 2018)

Small-Scale Plastic Deformation of Nanocrystalline High Entropy Alloy

Sanghita Mridha,
Mageshwari Komarasamy,
Sanjit Bhowmick,
Rajiv S. Mishra,
Sundeep Mukherjee

Affiliations

Sanghita Mridha: Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA
Mageshwari Komarasamy: Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA
Sanjit Bhowmick: Bruker Nano Surfaces, Minneapolis, MN 55344, USA
Rajiv S. Mishra: Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA
Sundeep Mukherjee: Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA

DOI: https://doi.org/10.3390/e20110889
Journal volume & issue: Vol. 20, no. 11
p. 889

Abstract

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High entropy alloys (HEAs) have attracted widespread interest due to their unique properties at many different length-scales. Here, we report the fabrication of nanocrystalline (NC) Al0.1CoCrFeNi high entropy alloy and subsequent small-scale plastic deformation behavior via nano-pillar compression tests. Exceptional strength was realized for the NC HEA compared to pure Ni of similar grain sizes. Grain boundary mediated deformation mechanisms led to high strain rate sensitivity of flow stress in the nanocrystalline HEA.

Published in Entropy

ISSN: 1099-4300 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Astronomy: Astrophysics; Science: Physics
Website: http://www.mdpi.com/journal/entropy

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