Yazar "Erek, H. B." seçeneğine göre listele

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    Corrosion behaviour and electrical conductivity of reinforced TiAl3 and B4C hybrid aluminium composites
    (Polish Academy of Sciences, 2017) Erek, H. B.; Özyürek, Dursun; Asan, Abdurrahman
    In this study, corrosion and electric conductivity of aluminum hybrid composites (in situ TiAl3 and ex situ B4C) produced by powder metallurgy are investigated. Hybrid (in situ and ex situ) aluminum composite powders are produced by adding different amounts of titanium and B4C into AA7075 alloy powders. After the hybrid composite powders are cold pressed (600 MPa), they are sintered in atmosphere controlled furnace at 580°C for 4 h. As a result of this study, it was observed that increase of B4C%(Ti constant) decreases density and increase of Ti%(B4C constant) increases the density of composites. It was determined that corrosion resistances (Rp) of hybrid composites decreased due to interface surfaces formed between the reinforcement phase and the matrix.
  • Küçük Resim
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    Electrical conductivity and corrosion performances of in situ and ex situ AA7075 aluminum composites
    (Polish Academy of Sciences, 2017) Erek, H. B.; Özyürek, Dursun; Asan, Abdurrahman
    The present study investigates corrosion behaviors and electric conductivity of AA7075 in situ (TiAl3) and ex situ (B4C) composites produced by powder metallurgy method. In production of in situ composites, various amounts of Ti (2, 4 and 6%) are added to AA7075 and for production of ex situ composites, B4C (3, 6, and 9%) are added. Prepared in situ and ex situ composite powders were pre-shaped at 600 MPa pressure with cold pressing. Pre-shaped samples were sintered in the atmosphere-controlled furnace at 580°C for 4 h. Corrosion test of produced composites was conducted in 0.1 M H2SO4 solution. As a result of these analyses, corrosion examinations on in situ manufactured composites revealed that anode and cathode currents are close to each other and those composites do not exhibit different corrosion behaviors. Corrosion rate of B4C added ex situ composites increases by B4C rate (due to increase of density of current).