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Breaking the anisotropic strength-ductility barrier in WA-DED AZ31 Mg alloy via spiral oscillation-enabled microstructure control: a combined experimental and simulation study
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DOI：10.1016/j.jma.2026.102203.png)
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Abstract
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• Spiral oscillation enables columnar-to-equiaxed transition without external fields. • Multi-scale finite element-sharp interface model clarifies refinement mechanism. • Asymmetric Marangoni flow and thermal undercooling induced by SO drive nucleation. • SO strategy increases the strength and elongation by 38% and 151%, respectively. • SO strategy leads to isotropy in tensile properties of WA-DED AZ31 alloy.
Keywords:
Magnesium alloy
Spiral oscillation
Microstructure
Simulation
Mechanical properties
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