Browsing by Author "Gokkaya H."

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • No Thumbnail Available
    Scopus
  • No Thumbnail Available
    Scopus
    Tensile test specimen preparing three different cutting method influence on the AA 6061-T6
    (2014-01-01) Kartal F.; Gokkaya H.; Yerlikaya Z.; Polat R.
    Aluminum 6061 (T6) material which is widely used in aviation and defense industries was treated with tensile test in this study. The samples for tensile test were manufactured using three production methods (namely, milling, CO2laser and abrasive water jet (AWJ). Following the tests sample surfaces were assessed for their surface roughness values. Samples which meet the TS EN ISO 6892-1 standard were assessed for their tensile strength, yield strength, percentage elongation and constriction. Among the test samples, sample prepared by milling proved to provide the best surface roughness value (1.32 μm). The highest tensile strength was obtained from the sample prepared using AWJ while the lowest was obtained from the sample prepared using laser cutting. Samples prepared using abrasive water jet showed 6.57 % difference in terms of tensile strength from samples prepared using milling.
  • No Thumbnail Available
    Scopus
    Turning of (Cu-Cr-Zr) alloy with abrasive water jet
    (2012-12-01) Kartal F.; Gokkaya H.; Nalbant M.
    In this research, the effect of the processing parameters on surface roughness during the turning of (Cu-Cr-Zr) alloy with abrasive water jet was studied. In the experimental studies, (Cu-Cr-Zr) alloy, ∅30 and 240 mm in size, was processed with abrasive water. In the experiment, pump pressure was 350 MPa, in the form of garnet abrasive and 80 mesh in size and nozzle diameter were kept constant at 1.2 mm. In addition to that in the parameters of nozzle feed rates (10, 15, 20 and 25 mm/min), abrasive flow rates (50, 150, 250 and 350 gr/min) and nozzle distances (2, 5, 8, 11 mm) were used in the tests. According to the results of the experiment, the increase in nozzle feed rate and nozzle distance lead to increase in average surface roughness. On the other hand, the increase in the number of turning speed and abrasive flow rate lead to decrease in average surface roughness. Average surface roughness was measured between 2.5 and 5.5 μm. © BHR Group 2012 Water Jetting 21.