Editing False brinelling (section)

{{use dmy dates |date=September 2020}}
[[File:FB-geschaedigtes Lager.jpg|thumb|False brinelling of a bearing]]
'''False brinelling''' is a [[Bearing (mechanical)|bearing]] damage caused by [[fretting]], with or without [[corrosion]],<ref>{{Cite web|url=https://www.researchgate.net/publication/316543220|title=Time-dependent analyses of wear in oscillating bearing applications (PDF Download Available)|last=Schwack|first=Fabian|date=2017-05-25|website=ResearchGate|access-date=2017-06-27}}</ref> that causes imprints that look similar to [[brinelling]], but are caused by a different mechanism. False brinelling may occur in bearings which act under small oscillations<ref>{{Cite web|url=https://www.researchgate.net/publication/309585771|title=Service Life of Blade Bearings - Problems Faced in Service Life Estimation of Blade Bearings|last1=Schwack|first1=Fabian|last2=Poll|first2=Gerhard|website=ResearchGate|access-date=2017-06-27}}</ref> or vibrations.<ref>{{Cite journal|last=Pittroff|first=Hans|date=1965-09-01|title=Fretting Corrosion Caused by Vibration With Rolling Bearings Stationary|journal=Journal of Basic Engineering|volume=87|issue=3|pages=713–723|doi=10.1115/1.3650657|issn=0098-2202}}</ref>

The basic cause of false brinelling is that the design of the bearing does not have a method for redistribution of [[lubricant]] without large rotational movement of all bearing surfaces in the raceway.<ref>{{Cite journal|last1=Schwack|first1=Fabian|last2=Bader|first2=Norbert|last3=Leckner|first3=Johan|last4=Demaille|first4=Claire|last5=Poll|first5=Gerhard|date=2020-08-15|title=A study of grease lubricants under wind turbine pitch bearing conditions|journal=Wear|language=en|volume=454-455|pages=203335|doi=10.1016/j.wear.2020.203335|issn=0043-1648|doi-access=free|url=https://repo.uni-hannover.de/bitstreams/0d6b4871-9466-4ad3-9ca6-de19dc849708/download}}</ref> Lubricant is pushed out of a loaded region during small oscillatory movements and vibration where the bearings surfaces repeatedly do not move very far.<ref>{{Cite book|title=Advanced Tribology|last1=Feng|first1=Chen|last2=Maruyama|first2=Taisuke|last3=Saito|first3=Tsuyoshi|date=2009|publisher=Springer, Berlin, Heidelberg|pages=42–43|doi=10.1007/978-3-642-03653-8_16|chapter = Oil Film Behavior under Minute Vibrating Conditions in EHL Point Contacts|isbn = 978-3-642-03652-1}}</ref> Without lubricant, wear is increased when the small oscillatory movements occur again.  It is possible for the resulting [[wear]] debris to [[Oxide|oxidize]] and form an abrasive compound which further accelerates wear.