Yazar "Sahin, Sadettin" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    The study of MIG weldability of heat-treated aluminum alloys
    (Springer London Ltd, 2013) Sevim, Ibrahim; Hayat, Fatih; Kaya, Yakup; Kahraman, Nizamettin; Sahin, Sadettin
    In this article, Metal Inert Gas (MIG) weldability of commercially received and aged samples of 6061-T-6 and 7075-T-651 aluminum alloys was investigated. The welding joints were prepared in ten different combinations. Microstructure, microhardness, EDX, energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD) analyses were used in order to evaluate the effect of aged heat treatment on the performance of welded joints. In addition, the mechanical properties of welding joints were characterized using the tensile and microhardness tests. In conclusion, it was shown that prewelding aging heat treatment improves the mechanical properties of welding joints.
  • [ X ]
    Öğe
    The effect of welding current on nugget geometry, microstructure and mechanical properties of TWIP steels in resistance spot welding
    (Springer Heidelberg, 2021) Sahin, Sadettin; Hayat, Fatih; Colgecen, Onur Cem
    In this study, two twinning induced plasticity (TWIP) steels with different chemical compositions were produced by casting-hot rolling-cold rolling processes. A total of four groups of samples were formed by obtaining cold-rolled and heat-treated samples giving optimum mechanical properties. Welding parameters of resistance spot welding (RSW) of all samples were determined, and weldability at different welding current values was examined. Button shapes, microstructures, microhardness, and tensile shearing tests of welded joints were investigated. In addition, scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analyses of broken samples were examined as a result of tensile testing. It has been concluded that non-heat-treated samples have higher tensile strength than heat-treated samples. In heat-treated steels; a marked increase in ductility was observed. It has been observed that RSWs of non-heat-treated steels have higher tensile load bearing capacity (TLBC) value.