2023 journal article

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Probing the Respective Strengthening Mechanism of High-entropy (CoCrFeNi/CoCrFeNiMn) and Single-principle-element (Cu-4Al) Alloys

JOURNAL OF ALLOYS AND COMPOUNDS, 969.

By: L. Fan ^*, J. Zhou ^*, X. Fang  ⁿ, Y. Wang ^*, X. Ma  ⁿ, M. Tsai ^*, Y. Zhu^* 

author keywords: High-entropy alloys; Mechanical properties; Deformation mechanism; Lomer-Cottrell locks

10.1016/j.jallcom.2023.172185

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Added: November 6, 2023

The strengthening mechanism of high-entropy alloys (CoCrFeNi/CoCrFeNiMn) is investigated and compared with a single-principle-element alloy (Cu-4Al) with similar stacking fault energy. Hall-Petch effect dominates the strain hardening of both alloys during progressive grain refinement to the ultrafine regime. Moreover, the high density of Lomer-Cottrell locks offers unique and extra hardening to ultrafine-grained high-entropy alloys.