Browsing by Author "Short K.T."

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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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    Characterization of austenitic stainless steel after plasma immersion nitrogen and carbon implantation
    (Elsevier Ltd, 2007) Saklakoglu I.E.; Saklakoglu N.; Short K.T.; Collins G.A.
    It has been shown in the literature that plasma immersion ion implantation (PIII) can increase the wear resistance of austenitic stainless steel without losing its corrosion resistance. In this work, the effect of PIII treatment with C ions introduced into the chamber during the process on the tribological properties of AISI 316 L stainless steel has been studied and the results compared. © 2006 Elsevier Ltd. 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.
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    The life of WC-Co cutting tools treated by plasma immersion ion implantation
    (2007) Saklakoglu I.E.; Saklakoglu N.; Ceyhun V.; Short K.T.; Collins G.
    In this study, the tool life of plasma immersion nitrogen-implanted cutting inserts while machining AISI 4140 steel has been investigated. The implantation time was 5 h and the temperature was in the range 320-520 °C. Implantation dose was ∼2×1018 ions cm-2 for all treatments. Surface topography of the implanted surfaces was obtained from atomic force microscopy. Results of the turning tests are discussed in terms of tool life (flank wear) and surface roughness of the workpieces. The results show that plasma immersion nitrogen implantation increased tool life by about 85%. © 2006 Elsevier Ltd. All rights reserved.