SYMPOSIA PAPER Published: 01 January 2000
STP14734S

Influence of Ambient Air on Nucleation in Fretting Fatigue

Source

Fretting damage often participates in failures caused by multiple site damage (MSD) as a nucleation process. Fretting itself is an extremely complex degradation process consisting of a combination of mechanical and chemical attacks. In order to avoid damage it is essential to understand which dominating parameter influences the crack nucleation.

The topography of the fracture surface, as well as changes in microstructure provide information about the dominant damage mechanism. An exact differentiation of the predominant damage mechanism can be established by microscopic and metallographic investigations.

Two service failures in axles for ski lifts, which suffered from fretting fatigue, are discussed. Though the macroscopic findings are very similar, the microscopic investigation indicates a completely different crack nucleation mechanism.

Author Information

Woodtli, J
EMPA Federal Laboratories for Materials Testing and Research, Surface- and Joining Technology
Trzebiatowski, Ov
EMPA Federal Laboratories for Materials Testing and Research, Surface- and Joining Technology
Roth, M
EMPA Federal Laboratories for Materials Testing and Research, Surface- and Joining Technology
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Details
Developed by Committee: E08
Pages: 257–266
DOI: 10.1520/STP14734S
ISBN-EB: 978-0-8031-5420-9
ISBN-13: 978-0-8031-2851-4