Browsing by Author "Tekmen, Cagri"

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A Comparative Study: the Combined Effect of the Cold Working and Age Hardening Processes on Pitting Behaviour of Al/Sic Metal Matrix Composites Under Saline Environment
(Sage Publications Ltd, 2016) Dikici, Burak; Tekmen, Cagri
The combined effect of cold working and age hardening treatment (T8) on the corrosion behaviour of Al-Si-Mg based metal matrix composite reinforced with silicon carbide particles has been investigated in 3.5wt% NaCl solution by potentiodynamic polarization technique. Composites containing 10 and 20 vol% silicon carbide particles were produced by compocasting technique and cold-worked at ratios of 4, 6, 10, 25 and 50% prior to ageing heat treatment conducted at 175 degrees C Corroded surfaces of the composites were observed by using scanning electron microscopy. A significant change in the corrosion behaviour of composites was observed when cold work ratio was increased from 4 to 50%. In addition, it has been found that the influence of cold working on corrosion behaviour is relatively higher compared to the effect of reinforcement content and age-hardening treatment.
Corrosion Performance and Microstructural Response of A380 Matrix Alloy Reinforced With Sol-Gel Tio2-Coated Sic Particles: a Perspective on Previous Studies
(Carl Hanser verlag, 2015) Dikici, Burak; Tekmen, Cagri; Yigit, Ozcan
In this study, the corrosion susceptibility of aluminium matrix composites reinforced with sol-gel TiO2-coated silicon carbide particles has been investigated. The corrosion of the composite, fabricated by means of a liquid metal infiltration technique, was established in chloride-containing alkaline environments using the potentiodynamic polarisation technique. Microstructural and interfacial characterisation of the composite was carried out by using an optical microscope, scanning electron microscope, energy dispersion spectroscopy and X-ray diffractometer. The corrosion performance and its effect on the composite microstructure are discussed in relation to previous observations.
The Effect of Electroless Ni Coating of Sic Particles on the Corrosion Behavior of A356 Based Squeeze Cast Composite
(Assoc Mechanical Engineers Technicians Slovenia, 2011) Dikici, Burak; Tekmen, Cagri; Gavgali, Mehmet; Cocen, Umit
The corrosion behavior of electroless Ni coated SiC particle reinforced squeeze cast aluminum based composite was investigated by potentiodynamic scanning (PDS) and electrochemical impedance spectroscopy (EIS) techniques in aerated and deaerated chloride solutions. Microstructural and interfacial characterization of the composite was carried out by using an optical microscope, scanning electron microscope (SEM), energy dispersion spectroscopy (EDS) and X-ray diffractometer (XRD). It has been observed that electroless Ni coating of SiC particles is not an effective method to improve its corrosion resistance in structural applications containing halide solution. (C)2011 Journal of Mechanical Engineering. All rights reserved.