Akademik Veri Yönetim Sistemi
Yükseköğretim Kurumları Destekli Proje, BAP Araştırma Projesi, 2021 - 2022
In this study, to investigate the effect of Ca addition on elevated temperature mechanical properties of AZ series magnesium alloys, 3 different alloys (AZ21, AZX211 and AZX311) were produced by the gravity die casting method. AZ63 alloy scraps, Mg-Ca master alloy and %99.5 purity magnesium were used to produce the alloys. Elemental and phase analyses, microstructural characterization were performed by using XRF, XRD, optical microscope and SEM-EDS. Tensile and wear tests were applied at 25 °C, 150 °C and 200 °C to reveal the room and elevated temperature service condition performances of alloys. Also, hardness (at 25 °C) was measured to figure out the mechanical properties of alloys. While the microstructure of AZ21 alloy contains only α-Mg, microstructures of AZX211 and AZX311 alloys composed of α-Mg, (Mg,Al)2Ca and Al2Ca due to the addition of Ca. It has been observed that the yield and tensile strengths of AZX211 alloy are better for all temperatures and it also has the lowest hardness (51.6 HV) as compared to the other vii alloys. When all temperatures wear rates are compared, it is understood that the AZX211 alloy has a stable wear rate for all applied load values.
Key Words : Hot dry wear, tribology, Mg-Al-Zn-Ca alloys, AZ series.