Abstract
Buildpauses can occur during metal additive manufacturing (AM) with laser power bed fusion (PBF-LB) for a variety of reasons such as power outage, insufficient gas flow, or sensor failure. It is economically desirable to continue a build after the issue is resolved. However, the effect on part quality, such as microstructure, surface roughness and geometric features is not well understood. This study considers parts fabricated with a 2-hourbuildpause in the center of the gauge section. Quantitative comparisons of the dimensions, as-built surface features, microstructure, and fatigue performance are determined. Geometric deviation from part shift during thebuildpauselocation is significant, however other anomalies inherent to AM can still dominate failure. Understanding the effect of material changes from abuildpausecan help reduce scrap from unintendedbuild interruptions.
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