Yilkiran, Deniz

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Yilkiran, Deniz
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Yilkiran, Deniz
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Yilkiran, D.
Yilkiran, Daniz
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    Item-typ:Veröffentlichung,
    New Specimen Design for Wear Investigations in Dry Sheet Metal Forming
    (2016)
    Yilkiran, Deniz
    ;
    Vollertsen, Frank
    ;
    Almohallami, Amer
    ;
    Wulff, Daniel
    ;
    Hübner, Sven
    In this study a new specimen for wear investigations on a wear testing stand in dry sheet metal forming will be presented. The study is focused on the investigation of the surface pressure in the contact area between wear specimen and sheet metal (DP600 Z). In a first step a numerical model was developed. The FEM model shows the resulting surface pressure on the specimenâ s surface over the entire length of a 60 mm cycle of wear tests. In the experimental wear investigations conducted on a wear testing stand the high strength steel DP600 with a galvanised surface was used. Both, the numerical model and the experimental validation of the model were carried out at room temperature.
    Wissenschaftlicher Artikel
    Band:Volume 2
      409  146
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    Item-typ:Veröffentlichung,
    Wear Testing of Thermally Oxidised Tool Steel Specimens with alpha-Fe2O3 Layers
    (2017)
    Yilkiran, Deniz
    ;
    Vollertsen, Frank
    ;
    Wulff, Daniel
    ;
    Özkaya, Fahrettin
    ;
    Hübner, Sven
    The paper presents results of wear investigations of thermally oxidised tool steel specimens with an alpha-Fe2O3 coating. The friction reducing ability of alpha-Fe2O3 layers on tool steel was shown in previous studies. Reduced friction and the layer s stability are prerequistes to realise a dry sheet metal forming process that avoids the use of additional drawing oils. This in turn will make the forming process more eco-friendly. The wear investigations were carried out on a wear test bench with the high strength sheet metal DP600 Z at a surface pressure of 80 MPa. Several thermally oxidised specimens were tested with different numbers of strokes in order to characterise the wear behaviour of the oxide layers. The surface analyses of the specimens were carried out using digital and scanning electron microscopy. Even after 5000 strokes (300 m of sheet metal) the 0.2 micrometre thin alpha-Fe2O3 coating was only partly degraded so that a wear reducing effect can be exploited in actual applications.
    Wissenschaftlicher Artikel
    Band:Volume 3
      413  113