Surface roughness parameter and modeling for fatigue behavior of additive manufactured parts: A non-destructive data-driven approach

Metallic additive manufacturing produces undesired surface roughness due to the nature of the layer-by-layer fabrication process. As-built surface roughness can accelerate surface crack initiation and result in an early fatigue failure under cyclic loading. Therefore, the effect of surface roughness on the structural integrity of additive manufactured parts needs to be characterized before they can be used in fatigue-critical applications. In...