Özet:

In this study, a double Al-25Zn alloy and Al-25Zn-0,01Ti, Al-25Zn-0,03Ti, Al-25Zn-0,04Ti, Al-25Zn-0,05Ti, Al-25Zn-0,075Ti, Al-25Zn-0,1Ti, Al-25Zn-0,2Ti, Al-25Zn-0,4Ti, Al-25Zn-0,6Ti, Al-25Zn-0,8 and Al-25Zn-1Ti were produced by the 11th triple aluminum-zinc-titanium alloy in the aromatic shape method. The interior, mechanical and corrosion characteristics of the produced alloys were studied. Internal studies were carried out with the electron microscope (SEM) and X-ray breakdown (XRD) studies. Mechanical characteristics were determined by the Brinell hardness measurement method and drawing experiment. Corrosion tests were conducted in the electrochemical test arrangement in accordance with the ASTM G5 standard. Al-25Zn and Al-25Zn-Ti alloys are made up of a and η phases as the main matrix, and if the titanium rate exceeds 0.01%, the Al3Ti phase in the interior begins to collapse. It was also found that the size of dendrits or tanes in Al-25Zn-Ti alloys was much smaller than the double receipt. It was observed that the contribution of titanium to the Al-25Zn alloy by 0.01% increased the strength, flow and pull strength values, while the contribution increased higher than that. Titanium contributions have been shown to have a negative impact on the corrosion properties. Changes in the mechanical and corrosion properties of the Al-25Zn alloy due to titanium contributions in different proportions were explained based on the structural properties of the alloy.

Anahtar Kelimeler:

Özet:

In this study, one binary Al-25n alloys and eleven ternary aluminum-zinc-titanium alloys, Al-25Zn-0.01Ti, Al-25Zn-0.03Ti, Al-25Zn-0.04Ti, Al-25Zn-0.05Ti, Al-25Zn-0.075Ti, Al-25Zn-0.1Ti, Al-25Zn-0.2Ti, Al-25Zn-0.4Ti, Al-25Zn-0.6Ti, Al-25Zn-0.8 and Al-25Zn-1Ti, were produced by permanent mold casting method. Structural, mechanical, and corrosion properties of the tested alloys were investigated. Structural investigations were carried out with scanning electron microscope (SEM) and X-ray diffraction (XRD) studies. Mechanical properties of the alloys were determined with the Brinell hardness and tensile tests. Corrosion tests were carried out with electrochemical test setup in accordance with ASTM G5 standard. Al-25Zn and Al-25Zn-Ti alloys were composed of α and η phases as the main matrix, and it was observed that Al3Ti phase began to precipitate in the microstructure when the titanium content exceeded 0.01%. In addition, the size of dendrites or grains of the Al-25Zn-Ti alloys was found to be much smaller than that of binary alloy. The hardness, yield strength, and tensile strength values of the Al-25Zn alloy significantly increased with the 0.01%Ti addition, but when Ti content exceeded 0.01%, these values decreased with increasing titanium content. It was observed that titanium addition had a negative effect on the corrosion properties of the Al-25Zn alloy. The change on the mechanical and corrosion properties of the Al-25Zn alloy due to the titanium addition in different ratios have been explained based on the structural properties of the alloys.