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Demonstrates the impact of Si-assisted cell structure on tensile behavior in AlSi10Mg alloy, indicating a complex interplay of strengthening and weakening effects.
Laser powder bed fusion (LPBF)-fabricated AlSi10Mg alloy exhibits markedly increased strain hardening at cryogenic temperatures because Si-assisted cell heterogeneity intensifies the accumulation of geometrically necessary dislocations and produces a strong hetero deformation induced hardening effect. However, coarse cells along melt pool boundaries promote severe strain localization that leads to early fracture without necking. This combined strengthening and weakening effect of the Si-assisted cell structure governs cryogenic tensile behavior.
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Park et al. (2026) studied this question.
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