Spring Fatigue Fractures Due to Microstructural Changes in Service
-
Published:2019
Abstract
An electric transport vehicle, similar to an electric trolley or subway rail car, experienced frequent breakdowns due to in-service fractures of torsion springs that support the weight of an overhead electric pickup assembly. Scanning electron microscopy and metallographic examinations determined that the fractures stemmed from electric arc damage. Intergranular quench cracks in the transformed untempered martensite on the surface of the spring provided crack initiations that propagated during operation causing fatigue fracture.
J. Maciejewski, B. Akyuz, Spring Fatigue Fractures Due to Microstructural Changes in Service, Handbook of Case Histories in Failure Analysis, Vol 3, Edited By Larry Berardinis, ASM International, 2019, p 339–342, https://doi.org/10.31399/asm.fach.v03.c9001800
Download citation file:
Join Failure Analysis Society
The ASM Failure Analysis Society (FAS) is a community where failure analysis professionals from all over the world can learn and grow in their field.
