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EN AC-42200 | AlSi7Mg0,6 Fatigue fracture vs. overload fracture

Numeric designationEN AC-42200
Chemical designationAlSi7Mg0,6
StateFatigue fracture vs. overload fracture
Etching5 % NaOH

In this microsection from an AlSi7Mg0,6 sand casting part, overload fracture surfaces and fatigue cracks were cut. While the fatigue cracks are rectilinear and transcrystalline, the overload fracture preferentially follows the interdendritic Al-Si eutectic.