Browsing by Author "Saklakoǧlu I.E."

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    Tribological behavior of PIII treated AISI 316 L austenitic stainless steel against UHMWPE counterface
    (2006) Saklakoǧlu N.; Saklakoǧlu I.E.; Short K.T.; Collins G.A.
    The aim of this work was to study the tribological benefits of PIII treated austenitic stainless steel by nitrogen ions and/or C ions in a ringer solution, which simulates the environment of the human body. This was achieved by hardness, wear and friction testing, and atomic force microscopy and XRD studies. The results showed that the samples, both treated and untreated, exhibited virtually no wear from contact with the ultra high molecular weight polyethylene (UHMWPE) pins, however, the pins themselves exhibited wear. The amount of wear of the pins was found to decrease with increasing PIII treatment temperature, but addition of C to the chamber caused some increase the amount of wear on the pins. Although C ions reduced to improve the hardness, friction characteristic was improved by formation of carbon-expanded austenite. © 2005 Elsevier B.V. All rights reserved.
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    Tribological behaviour of plasma immersion ion implanted AISI 304 stainless steel against polymer and ceramic counterfaces
    (2007) Saklakoǧlu N.; Saklakoǧlu I.E.; Ceyhun V.; Aǧaçhan N.; Short K.T.; Collins G.A.
    Type 304 austenitic stainless steel samples were implanted with nitrogen using plasma immersion ion implantation (Pill) at different temperatures between 350 and 500°C. Treated and untreated samples have been studied by wear-friction testing, microhardness measurement and scanning electron microscopy (SEM).The experimental results indicated that the hardness and wear resistance is improved by increasing the penetration depth of nitrogen, whereas the friction coefficient is significantly increased by PIII. © 2007 Institute of Materials, Minerals and Mining.