Extended Data Fig. 8: Fractographic observations of fatigue failures in AM NTD-Al alloy.
From: Achieving ultrahigh fatigue resistance in AlSi10Mg alloy by additive manufacturing
(a–c) Fracture surface of AM NTD-Al alloy at different fatigue loading strength, R = 0.1; (d–f) three typical regions pointed out by white arrows in Extended Fig. 8A. The fatigue crack usually initiates at the largest pore next to the sample surface. Many smaller defects were also found on the fracture surface. The interspacing between neighboring defects ranges from tens to hundreds of microns. Obvious Si cellular boundaries were also found on the fracture surface.
