Cracks and degradation layers in large flat-on-flat fretting contact with steels and cast iron
Juoksukangas, Janne; Nurmi, Verner; Hintikka, Jouko; Honkanen, Mari; Vippola, Minnamari; Lehtovaara, Arto; Mäntylä, Antti; Vaara, Joona; Frondelius, Tero (2019-12-04)
Janne Juoksukangas, Verner Nurmi, Jouko Hintikka, Mari Honkanen, Minnamari Vippola, Arto Lehtovaara, Antti Mäntylä, Joona Vaara, Tero Frondelius, Cracks and degradation layers in large flat-on-flat fretting contact with steels and cast iron, Tribology International, Volume 145, 2020, 106102, ISSN 0301-679X, https://doi.org/10.1016/j.triboint.2019.106102
© 2020 Elsevier Inc. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe2020051229413
Tiivistelmä
Abstract
Fretting may deteriorate contacts in terms of wear and cracking. Fretting-induced material degradation and frictional behaviour was studied experimentally in a large flat-on-flat fretting contact with a moderate nominal normal pressure and in different sliding conditions. The materials studied were cast iron, structural steel, and quenched and tempered steel. The results for all materials revealed a severely deformed microstructure, a tribologically transformed structure with high hardness, an oxidized third body layer and cracking. The initial peak in the coefficient of friction followed by stabilization occurred in all material pairs in gross sliding conditions. With low utilization of friction, only a limited amount of damage occurred. The results for each of these materials were compared.
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