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    Effect of anodic oxidation on tribological behavior of 2017A alloy
    (Gazi Univ, 2023) Akincioglu, Guelsah
    Aim In this study, it was aimed to improve the tribological properties of 2017A aluminum alloy by anodic oxidation.Design & Methodology In order to investigate the effect of 2017A aluminum alloy hard anodizing and phosphoric anodic oxidation, the microhardness, friction coefficient, wear resistance, vibration, and worn surface images of the samples were evaluated.Originality The effect of hard anodizing and phosphoric anodic oxidation on the tribological properties of 2017A aluminum alloy. Findings Anodic oxidation has improved the tribological properties of the 2017A aluminum alloy.Conclusion Anadic oxidation improved the wear properties of 2017 A aluminum alloy. Hard Anodizing (HAC) further increased the wear resistance of the samples.Declaration of Ethical Standards The author of this article declares that the materials and methods used in this study do not require ethical committee permission and/or legal-special permission.
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    The effects of resin rate (wt-%) on different temperature performance of newly designed friction composites for automobile brake lining applications
    (Taylor & Francis Ltd, 2023) Akincioglu, Guelsah
    Choosing the amount of binder resin in a brake lining composition is important in terms of avoiding structural deterioration of the brake lining composite and resisting mechanical and thermal stresses at different temperatures. This study evaluated the performances of new brake lining composites with 15% and 20% novolac resin additives by performing wear tests in different temperature environments. Friction wear tests were performed according to ASTM G99 using pin-on-disc test devices at temperatures of 23 degrees C, 150 degrees C and 300 degrees C. The hardness and density of the samples increased by 2.4% and 3.7%, respectively, with the increase of the novolac resin ratio in the composition. In general, it was observed that the friction coefficient, thermal conductivity and vibration increased in parallel with the resin ratio. In addition, increasing the test temperature led to an increase in the friction coefficient.