Abstract In this study, we characterized interfacial mechanisms to better understand the active–passive state for a laser powder-bed-fused (L-PBF) AlSi12 alloy. We compared the additive manufactured microstructures obtained via the L-PBF process vs. the traditional casting method with respect to their influence on corrosion properties. Corrosion resistance was assessed by the damage mechanism based on the corrosion initiation probability and electrochemical behavior in the AlSi12 eutectic alloy. The disconnected silicon network was identified as the vulnerable and lower-corrosion-resistance region in the L-PBF AlSi12 alloy. Without the influence of any additive on the Al-Si alloy system, the damage was correlated with microstructure distortion and mechanical fracturing of the developed oxide structure.

中文翻译：

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模拟大气条件下激光粉末床熔融AlSi12的界面稳定性

摘要 在这项研究中，我们表征了界面机制，以更好地了解激光粉末床熔融 (L-PBF) AlSi12 合金的主动-被动状态。我们比较了通过 L-PBF 工艺获得的增材制造微观结构与传统铸造方法对腐蚀性能的影响。基于 AlSi12 共晶合金的腐蚀起始概率和电化学行为，通过损伤机制评估耐腐蚀性。断开的硅网络被确定为 L-PBF AlSi12 合金中的脆弱和低耐腐蚀性区域。在没有任何添加剂对 Al-Si 合金系统的影响的情况下，损伤与微观结构畸变和发达氧化物结构的机械断裂有关。