Farklı oranlardaki çinko katkılarının AC-48100 (Al-17Si-4Cu-Mg) alaşımının yapısal, mekanik ve tribolojik özelliklerine etkisinin incelenmesi

Abstract

 Structural and mechanical properties of EN AC-48100+Zn alloys  Tribological properties of EN AC-48100+Zn alloys  Solid solidification hardening due to zinc addition Figure A. The curves showing the change of hardness, yield strength, tensile strength, and elongation to fracture of the Al-17Si-4Cu-0.6Mg-0.2Ti-(0-5)Zn alloys as a function of zinc content Purpose: The main purpose of this study is to investigate the effect of zinc content on the structural, mechanical and tribological properties of EN AC-48100 (Al-17Si-4Cu-Mg) alloy produced by permanent mold casting method. Theory and Methods: In this study, Al-17Si-4Cu-0.6Mg-0.2Ti, Al-17Si-4Cu-0.6Mg-0.2Ti-1Zn, Al-17Si-4Cu-0.6Mg-0.2Ti-2Zn, Al-17Si-4Cu-0.6Mg-0.2Ti-3Zn, Al-17Si-4Cu-0.6Mg-0.2Ti-4Zn and Al-17Si-4Cu-0.6Mg-0.2Ti-5Zn alloys were produced by permanent mold casting method. Microstructures of the produced alloys were examined with optical, scanning electron microscopy and XRD studies. The hardness and microhardness of the alloys were determined by Brinell and Vickers measurement methods, respectively, and their mechanical properties were determined by tensile tests performed by a universal test machine. Dry sliding friction and wear tests were carried out according to ASTM: G99 using a ball-on-disc type tribotest machine. Results: In the microstructure of Al-17Si-4Cu-0.6Mg-Ti and Al-17Si-4Cu-0.6Mg-0.2Ti-Zn alloys, no new phase was formed, with the increase in zinc ratio, but primary silicon particles were become coarsen. The hardness of the alloys increased with increasing zinc additions, however the yield, tensile strength and wear resistance increased up to %3 zinc content, but above it these values decrease. Conclusion: Zinc can be used in the EN AC-48100 alloy as a solid solution element. Certain rates of zinc addition positively effect the hardness, strength and wear resistance of the Al-17Si-4Cu-Mg alloys.