Powder contamination during laser powder bed fusion is a critical concern for the quality assurance of parts. Herein, we studied the effect of Inconel 718 contamination on the properties of printed Ti6Al4V, two commonly printed alloys. Contaminated parts exhibited visual and microstructural defects, and a mere 0.5 wt% IN718 contamination resulted in a 43 % reduction in plastic strain without noticing surface-level cracking. Further contamination of 2.5 wt% IN718 promotes surface cracking that renders the material unable to deform plastically, highlighting the importance of proper powder handling and the detrimental effects that even small amounts of contaminants can have on AM-produced components.

中文翻译：

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激光粉末床熔化过程中的粉末污染：Ti6Al4V 中的 Inconel 718

激光粉末床熔化过程中的粉末污染是零件质量保证的一个关键问题。在此，我们研究了 Inconel 718 污染对打印 Ti6Al4V（两种常用打印合金）性能的影响。受污染的零件表现出视觉和微观结构缺陷，仅 0.5 wt% IN718 污染即可导致塑性应变减少 43%，而没有注意到表面裂纹。 2.5 wt% IN718 的进一步污染会促进表面开裂，导致材料无法塑性变形，这凸显了正确粉末处理的重要性以及即使少量污染物也可能对增材制造部件产生的有害影响。