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Synergy of stacking fault energy and lattice friction on dislocation-mediated strengthening and fatigue resistance in additively manufactured FCC high-entropy alloy
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甘
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DOI：10.1016/j.ijplas.2026.104772.png)
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Abstract
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• The synergistic effect of stacking fault energy (SFE) and lattice friction stress (LFS) on dislocation-mediated enhancement of strength and fatigue resistance was elucidated for the first time. • Dislocation configurations in the as-printed alloys transform from cellular structures to planar arrays with Al alloying. • The yield strength increases from 485 to 729 MPa while maintaining ∼25% uniform elongation. • Optimized alloy composition with low SFE but medium LFS shows remarkable fatigue resistance through twinning, stacking faults, and newly discovered localized dynamic recrystallization. • The theoretical roadmap of the synergistic effect from SFE and LFS on the fatigue performance of the FCC-structured HEA was given.
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