Failure Analysis of a Cracked Gasoline Engine Cylinder Head
This article presents a failure analysis of an aluminum cylinder head on an automotive engine. During an endurance test, a crack initiated from the interior wall of a hole in the center of the cylinder head, then propagated through the entire thickness of the component. Metallurgical examination of the crack origin revealed that casting pores played a role in initiating the crack. Stress components, identified by finite element analysis, also played a role, particularly the stresses imposed by the bolt assembly leading to plastic strain. It was concluded that the failure can be prevented by eliminating the bolt hole,...
M. Azadi, A. Mafi, M. Roozban, F. Moghaddam, Failure Analysis of a Cracked Gasoline Engine Cylinder Head, Handbook of Case Histories in Failure Analysis, Vol 3, Edited By Larry Berardinis, ASM International, 2019, p 57–65, https://doi.org/10.31399/asm.fach.v03.c9001760
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