This atlas of microfractographs—fracture images seen under a microscope, includes both profile and surface views of the specimens, and comprises a systematic documentation of aluminumsilicon alloys with relevant descriptions. The challenges of fractography are discussed in a comprehensive manner. The atlas contains images of fractures obtained during laboratory testing of mechanical properties. A set of images covers hypoeutectic, eutectic, and hypereutectic (mainly permanent mold) cast aluminumsilicon alloys. The surface of fractures visible under highresolution scanning electron microscopy (SEM) are shown together with subsurface effects on metallographic specimens normal to the fracture plane, observed with light microscopy.