Akademik Veri Yönetim Sistemi
5TH INTERNATIONAL CONFERENCE ON SCIENTIFIC AND INNOVATIVE STUDIES ICSIS 2025, Konya, Türkiye, 15 - 16 Temmuz 2025, ss.184-192, (Tam Metin Bildiri)
This study investigates the effects of different cutting speeds and feed parameters on the surface
roughness and drilling temperature of an Al-7Si-Mg alloy during drilling. The alloy was manufactured
using the gravity casting method and machined using a total of nine different parameter combinations on a
CNC vertical machining center. Temperatures generated during machining were monitored in real time
with a thermal camera, post-processing surface roughness was measured, and microstructure-mechanical
tests were conducted. Microstructural analyses revealed the presence of eutectic Si phases within the α-Al
matrix, as well as intermetallic structures such as β-Al5FeSi and π-AlSiMgFe. Mechanical tests indicate
that the alloy, which was not heat-treated after casting, has acceptable strength and ductility levels. The
machinability findings indicate that high cutting speeds reduce surface roughness but increase maximum
temperatures in the cutting zone. Increasing feed rates negatively affect surface quality but lower the
temperature. The results show that the machinability performance of Al-7Si-Mg alloy is highly sensitive to
cutting parameters and these parameters should be carefully selected for optimum surface quality and
thermal stability.