Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy

Z. G. Zhu; X. H. An; W. J. Lu; Z. M. Li; F. L. Ng; X. Z. Liao; U. Ramamurty; S. M. L. Nai; J. Wei

doi:10.1080/21663831.2019.1650131

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Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy

Original Report | 更新时间：2026-08-19

- Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy
- Materials Research Letters Vol. 7, Issue 11, Pages: 453-459(2019)
- 作者机构：
  
  1. Singapore Institute of Manufacturing Technology
  2. School of Aerospace Mechanical and Mechatronic Engineering The University of Sydney
  3. Max-Planck-Institut für Eisenforschung
  4. School of Mechanical and Aerospace Engineering Nanyang Technological University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2019.1650131
  CLC：
- Online First：02 August 2019，
  
  Published：2019
- 稿件说明：
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Z. G. Zhu, X. H. An, W. J. Lu, et al. Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy[J]. Materials Research Letters, 2019, 7(11): 453-459.
DOI：

Z. G. Zhu, X. H. An, W. J. Lu, et al. Selective laser melting enabling the hierarchically heterogeneous microstructure and excellent mechanical properties in an interstitial solute strengthened high entropy alloy[J]. Materials Research Letters, 2019, 7(11): 453-459. DOI： 10.1080/21663831.2019.1650131.

摘要

Abstract

BSTRACTAn interstitial solute strengthened high entropy alloy (iHEA)

49.5

0.5

(at.%)

was successfully additively manufactured via selective laser melting. The as-built iHEA exhibits a hierarchically heterogeneous microstructure with length scales across several orders of magnitude

which engenders an enhanced strength–ductility combination relative to those fabricated by conventional processing routes. The high yield strength mainly stemmed from the dislocation strengthening besides the friction stress and grain boundary strengthening. The joint activation of multiple deformation mechanisms involving dislocation slip

deformation twinning and phase transformation can maintain the steady work-hardening behavior at high stress levels

leading to a high ductility.

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