SEARCH RESULT

AlSi12 alloys and alloys produced by Mg addition at different ratios (1% - 2% and 4%) were manufactured by pressurized casting method. Quartz tubes with an inner diameter of 8 mm were used in the castings of the alloys. All castings were carried out in an argon gas atmosphere. These samples (7 mm x 20 mm) were homogenized at 520 ° C for 6 hours. Samples prepared by standard metallographic procedures were immersed in a jar containing 30 gr/l NaCl + 10 ml/l HCl acid solution and samples were weighed at 2-6-12-24 hours intervals. It is clear that the increased Mg ratio reduces the corrosion resistance of the alloys. The reason for this decrease in corrosion resistance is Mg2Si which is likely to occur after Mg addition. Intermetallic are thought to accelerate corrosion by forming a galvanic couple with the matrix. As a result of the corrosion test, SEM images taken from the surface also support our corrosion graph. Thus, when we look at the samples without Mg addition, it is seen that the surface deformation is very small compared to the samples produced by Mg addition.

International Conference of Advanced Materials and Manufacturing Technologies
ICAMT

Engin ÇEVİK S. Yasin Harun ÇUĞ Necmi Ozdemir R. Yildiz S. Akka

In this study, 1% and 4% pure magnesium were added to pure aluminum alloy by using pressure casting method. These samples (7 mm x 20 mm) were homogenized at 520 ° C for 6 hours. Corrosion tests were performed by suspending samples of certain sizes into 30 gr/l NaCl + 10 ml/l HCl solutions, measuring the mass loss. When we compare the produced alloys, it is observed that as the magnesium addition increases, the weight loss increases and the corrosion resistance decreases. In pure aluminum, 0.84 g/mm2 was achieved at the end of 24 hours, while the weight loss of the samples we added 4% Mg increased by 300% to 2.23 g/ mm2. The decrease in the corrosion resistance is caused by the addition of Mg and the possible formation of intermetallic (Al37Mg3 etc.) in the structure.

International Conference of Advanced Materials and Manufacturing Technologies
ICAMT

Engin ÇEVİK S. Yasin C. T. Kaymaz C. Kayapinar G. Akyuz C. Urhal M. Caliskan M. Kangal

In this study, AlSi12 alloy and alloys produced by Mg addition at different ratios (%2 and 4%) were manufactured by pressurized casting method. Homogenization of 520 °C was applied to the produced alloys using electric resistance furnace. Wear behaviors were determined on the data obtained from experiments on the pin-on-disc type abrasion device. DIN 2379 quality cold work tool steel were used as a counter materials during the wear tests. Experiments were carried out at a shear rate of 0.5 m/s at a shear distance of 9000 m under two different loads (10-20 N). The test results were determined by measuring the weight loss of the samples. In order to determine the wear characteristics after the abrasion tests, the worn surfaces were examined with a SEM. The addition of Mg has resulted in significant improvement in abrasion resistance. It has been found that Mg2Si phases which may occur in the structure by Mg addition increase the abrasion resistance of the alloys. When the SEM photographs of the worn surfaces were examined, it is seen that the wear is in the form of groove formation and part plaster, which indicates that it is the adhesive wear characteristic.

International Conference of Advanced Materials and Manufacturing Technologies
ICAMT

Engin ÇEVİK S. Yasin Harun ÇUĞ D. Caliskan S. Gullu T. Cayir