3D Fe-Rich Phases Evolution and Its Effects on the Fracture Behavior of Al–7.0Si–1.2Fe Alloys by Mn Neutralization

The evolution of the 3D Fe-rich phases Al–7.0Si–1.2Fe alloys with different Mn contents was visualized and characterized using synchrotron X-ray computed tomography, effect typical morphologies on fracture behavior during tensile testing analyzed. results showed that phase changed from platelet-like ?-Al5FeSi into ?-Al15(FeMn)3Si2 various after addition Mn. not only significantly reduced volume fraction, equivalent diameter interconnectivity but also greatly increased sphericity, surface thickness, distribution mean curvature thickness. Furthermore, had an inverse exponential function relationship its sphericity. morphology can be summarized as massive regular polyhedrons, hollow multibranched polyhedrons. fraction in each alloy is related to content, where excess number large particles a low ductility improved by gradually decreased when Mn/Fe ratio exceeded 1.2. increase ?-Al15(MnFe)3Si2 sphericity main reason for high content.