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Effects of Fuel Contamination to Marine Lubricant on Friction Behaviors between Piston Ring and Cylinder Liner

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Aydin Z., Savaş Ö., Parlak A., Keskin İ., Ünlügençoğlu K.
Acta Physica Polonica A
|
2016
|
vol. 129
|
issue 4
617-620
EN
In internal combustion engines, friction losses caused by piston ring and cylinder liner pair account for approximately 20% of total mechanical friction losses as reported in literature. A reduction in friction between piston ring and cylinder liner pair would therefore result in higher efficiency, lower fuel consumption and reduced emissions. In this study, the effects of different types of fuel which is contaminated to cylinder oil have been tested for investigating the friction behavior between piston ring and cylinder liners pair by a reciprocating tester depending on the load, revolution and temperature. The results showed that lubricant type and revolution have been found significant on friction behavior.
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Corrosion Behavior of in-Situ AlB₂/Al-Cu Metal Matrix Composite

100%
Elcicek H., Savaş Ö., Aydin Z., Özdemir O., Kayikci R.
Acta Physica Polonica A
|
2016
|
vol. 129
|
issue 4
661-664
EN
The aim of this study was to fabricate 30 wt.% AlB₂/Al-Cu composites using in-situ casting processes and to investigate the corrosion behavior of the composites and of the matrix material in various media. The electrochemical parameters were obtained from potentiodynamic polarization curves. The composites were prepared by liquid reaction of aluminum matrix with boron oxide at 1400°C. The results show that the corrosion resistance of the composite was higher than that of the matrix in selected corrosion media. The anodic corrosion current density values were decreased by reinforcing AlB₂ particles.
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