Back (Failure Cases)

AC-46000 | AlSi9Cu3(Fe) Fatigue fracture in sand casting

Numeric designationAC-46000
Chemical designationAlSi9Cu3(Fe)
StateSandguss, Schwingbruch

The sand-cast component made of AlSi9Cu3(Fe) (prototype) failed in the test; several separate fatigue cracks originated from shrinkage cavities and gas bubbles. Unusual fatigue fracture without vibration striations, but clearly different from (usually ductile) final overload fracture.