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Materials Science Mechanics

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Open Unknowns

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Cross-Domain Bridges

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Active Hypotheses

Open Unknowns (1)

Unknown What dislocation mechanisms produce the exceptional combination of high strength and high ductility observed in high-entropy alloys (HEAs), and can these be predicted from first principles? u-dislocation-dynamics-alloy-high-entropy

Active Hypotheses

Hypothesis The exceptional strength-ductility combination in CrMnFeCoNi-type high-entropy alloys arises primarily from chemical short-range order (SRO) that creates spatially heterogeneous Peierls barriers, causing dislocations to develop wavy glide paths that reduce stress concentrations at grain boundaries and delay necking to strains exceeding 50%. high

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