Title of article :
Characterization of fatigue and adhesion properties of a-C:H/CrN coatings on bearing rings by impact tests
Author/Authors :
Bouzakis، نويسنده , , K.-D. and Asimakopoulos، نويسنده , , A. and Batsiolas، نويسنده , , M.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
7
From page :
5929
To page :
5935
Abstract :
The impact test is used for the quantitative assessment of various properties of thin hard coatings, deposited on machine elements, tools etc. This test is mainly applied on coated specimens with simple geometries such as of cutting inserts and coated plates. In the described investigations, perpendicular and inclined impact tests were conducted directly on PVD coated bearing rings. The tests were performed with the aid of appropriate fixtures on the internal cylindrical surface of the outer bearing ring, as well as on the external one of the inner ring. Through a developed FEM simulation of the contact between the indenter ball and the cylindrical ring surfaces during the perpendicular and the inclined impact test, the film fatigue endurance stress was determined and the coatingʹs adhesion was quantified. The mechanical properties of the applied thin films and substrates, used in the FEM calculations, were detected by nanoindentations and appropriate results evaluation. The obtained film fatigue endurance stress of the investigated coating can be considered as adequate however the coating adhesion is assessed as poor.
Keywords :
Impact Test , PVD coatings , Bearings
Journal title :
Surface and Coatings Technology
Serial Year :
2008
Journal title :
Surface and Coatings Technology
Record number :
1819771
Link To Document :
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