Issue 9, 2020

A novel nanostructure to achieve ultrahigh strength and good tensile ductility of a CoCrFeNiMn high entropy alloy

Abstract

A CoCrFeNiMn high entropy alloy with a novel nanostructure consisting of ultrafine grains, TiO(C) nanoparticles and nanotwins has been fabricated. It achieves an ultrahigh tensile yield strength of 1507 MPa by coupling multiple strengthening mechanisms, including grain boundary strengthening, twin boundary strengthening, nanoparticle strengthening and dislocation strengthening. The work hardening ability is also improved by coupling the interactions of dislocations with nanoparticles and nanotwins during plastic deformation, leading to a good tensile ductility with a uniform elongation of 4.7%.

Graphical abstract: A novel nanostructure to achieve ultrahigh strength and good tensile ductility of a CoCrFeNiMn high entropy alloy

Supplementary files

Article information

Article type
Communication
Submitted
07 Nov 2019
Accepted
19 Feb 2020
First published
19 Feb 2020

Nanoscale, 2020,12, 5347-5352

A novel nanostructure to achieve ultrahigh strength and good tensile ductility of a CoCrFeNiMn high entropy alloy

Y. Xie, T. Xia, D. Zhou, Y. Luo, W. Zeng, Z. Zhang, J. Wang, J. Liang and D. Zhang, Nanoscale, 2020, 12, 5347 DOI: 10.1039/C9NR09512H

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