Yazar "Yarkadas, Guven" seçeneğine göre listele

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    Effect of Al2O3 Nano Particle Addition on Mechanical Properties and Creep Behaviour of High Pressure Die Cast AZ91-1Sr Alloy
    (Taylor & Francis Ltd, 2022) Ates, Yusuf; Ozarslan, Selma; Yarkadas, Guven; Sevik, Huseyin
    The AZ91-1Sr alloy, the 0.5, 1 and 2 vol.% Al2O3/AZ91-1Sr nanocomposites were fabricated by high pressure die casting method and investigated the effect of nano Al2O3 particles on the mechanical properties and creep behaviour of the AZ91-1Sr alloy. Mechanical and creep tests disclosed remarkable enhancements in the yield strength, tensile strength, hardness and creep resistance of the AZ91-1Sr alloy with addition of nano Al2O3 particles. The best results were obtained in the case of the addition of 2 vol.% Al2O3 nano particles.
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    Öğe
    Effect of Lanthanum on mechanical and wear properties of high-pressure die-cast Mg-3Al-3Sn-3Sb alloy
    (Walter De Gruyter Gmbh, 2021) Yarkadas, Guven; Kumruoglu, Levent Cenk; Ozarslan, Selma; Sevik, Huseyin
    In the present study, the effect of an La alloying element with different quantities (1, 3 and 5 wt.-%) on the microstructure, mechanical and dry sliding wear properties of Mg-3Al-3Sn-3Sb alloy was investigated. The wear tests were done on the alloys using pin on-disk equipment against a 4140 steel disc as counterpart under three different sliding velocities of 0.3, 0.6 and 1.2 ms(-1) and four different loads of 5, 10, 20 and 40 N. The microstructural results showed that the new intermetallic phases (La5Sn3 and LaSnSb2) were formed with addition of La to the main alloy. Also, it was observed that the hardness of the Mg-3Al-3Sn-3Sb alloy was raised with increasing La addition. Furthermore, the tensile properties of the Mg-3Al-3Sn-3Sb alloy improved with rising La content at room and elevated temperature. The wear rates of the alloys increase with increasing of the sliding speed and load. In addition to this, the wear rate of the Mg-3Al-3Sn-3Sb alloy was found to be higher than that of the La content alloys for all test conditions.