Issue 4, 2024

Deformation mechanisms in high entropy alloys: a minireview of short-range order effects

Abstract

The complex atomic scale structure of high entropy alloys presents new opportunities to expand the deformation theories of mechanical metallurgy. In this regard, solute-defect interactions have emerged as critical piece in elucidating the operation of deformation mechanisms. While notable progress has been made in understanding solute-defect interactions for random solute arrangements, recent interest in high entropy alloys with short-range order adds a new layer of structural complexity for which a cohesive picture has yet to emerge. To this end, this minireview synthesizes the current understanding of short-range order effects on defect behavior through an examination of the key recent literature. This analysis centers on the nanoscale metallurgy of deformation mechanisms, with the order-induced changes to the relevant defect energy landscapes serving as a touchstone for discussion. The topics reviewed include dislocation-mediated strengthening, twinning and phase transformation-based mechanisms, and vacancy-mediated processes. This minireview concludes with remarks on current challenges and opportunities for future efforts.

Graphical abstract: Deformation mechanisms in high entropy alloys: a minireview of short-range order effects

Article information

Article type
Minireview
Submitted
17 ኦክቶ 2023
Accepted
19 ዲሴም 2023
First published
21 ዲሴም 2023

Nanoscale, 2024,16, 1650-1663

Deformation mechanisms in high entropy alloys: a minireview of short-range order effects

N. Rasooli, W. Chen and M. Daly, Nanoscale, 2024, 16, 1650 DOI: 10.1039/D3NR05251F

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