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The effect of various treatment parameters in duplex plasma nitrided and diamond-like carbon coating on high-cycle fatigue and fretting fatigue lifetimes of piston pin 16MnCr5 steel

Authors :
Mobin Dizisaz
Mohammad Azadi
Source :
Applied Surface Science Advances, Vol 22, Iss , Pp 100616- (2024)
Publication Year :
2024
Publisher :
Elsevier, 2024.

Abstract

This paper investigates the impact of duplex plasma nitriding and diamond-like carbon (DLC) coatings on the pure fatigue and fretting fatigue properties of 16MnCr5 steel extracted from industrial piston pins used in combustion engines. Two different nitriding and DLC coating processes were performed: ''DLC-A'' and ''DLC-B''. The Raman spectrometry and microhardness tests were utilized to evaluate the formation of DLC coating on the sample. Subsequently, the pure and fretting fatigue tests (at 350 MPa and under 100 Hz of the frequency) were performed on as-cast and DLC-coated specimens to obtain the effect of coatings on the fatigue behaviors of the 16MnCr5 steel. Finally, the formation of the DLC layer and the fracture mechanisms were also briefly investigated using field-emission scanning electron microscopy. Then, the obtained results demonstrated that DLC coating (''DLC-B'') increased the fatigue lifetime of 16MnCr5 steel by 47.7 % and 85.3 % in pure and fretting fatigue conditions, respectively. This layer can improve the surface properties of engineering materials and components, which can enhance the fatigue lifetime by increasing microhardness and compressive residual stress, reducing wear and friction, and improving adhesion between the substrate and coating. However, due to the white layer, the “DLC-A” improperly enhanced the material performance.

Details

Language :
English
ISSN :
26665239
Volume :
22
Issue :
100616-
Database :
Directory of Open Access Journals
Journal :
Applied Surface Science Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.6efd07bb706543f0bab698a9acf20052
Document Type :
article
Full Text :
https://doi.org/10.1016/j.apsadv.2024.100616