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

journal contribution
posted on 2024-02-21, 19:30 authored by Novin Rasooli, Wei Chen, Matthew DalyMatthew Daly
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.

Funding

CAREER: Order-induced heterogeneities in the deformation behavior of FCC concentrated solid solutions | Funder: Directorate for Mathematical & Physical Sciences | Grant ID: 2144451

History

Citation

Rasooli, N., Chen, W.Daly, M. (2024). Deformation mechanisms in high entropy alloys: a minireview of short-range order effects. Nanoscale. https://doi.org/10.1039/d3nr05251f

Publisher

Royal Society of Chemistry (RSC)

Language

  • en

issn

2040-3364