The Effect of MgO Particle Size and Cutting Tool Geometry on Machinability in Turning Al 2024/MgO Composite

Abstract

In this study, the effect of ceramic particle size reinforced on aluminum matrix composites on machinability was investigated. For this purpose, in the first stage, composite materials were produced by mixing MgO particles in three different sizes by reinforcing 10% by weight into liquid Al 2024. Then, machinability tests were carried out on the produced composites by turning method, using two different cutting tools. In the experiments, 63, 94, 133 and 196 m/min cutting speeds, 0.03 mm/rev feed rate and 1 mm fixed cutting depth were applied. The roughness measurements of the machined surfaces were made, the chip shapes were examined and the wear behavior of the cutting tools used was examined. As a result, it was seen that the MgO reinforcement particle size in the aluminum matrix and different cutting tools did not have a significant effect on the surface roughness, chip shape and tool wear. Changes in cutting speed had the most important effect on surface roughness. Likewise, changes in cutting speed were the most effective parameters in chip shapes and cutting tool wear behavior.

Keywords

• Metal matrix composite
• MgO grain size
• Cutting tool type
• Surface roughness
• Chip shape
• Tool wear

Al 2024 Matrisli Farklı Boyutlarda MgO Takviyeli Kompozitlerin Farklı Kesici Takımlarla Tornalanmasında Yüzey Pürüzlülüğü Takım Aşınması ve Talaş Formunun İncelenmesi

Abstract

Bu çalışmada alüminyum matrisli kompozitlere takviye edilen seramik parçacık boyutunun işlenebilirliğe etkisi incelenmiştir. Bu amaçla ilk etapta üç farklı boyuttaki MgO parçacıkları, %10 ağırlık oranında sıvı Al 2024 içerisine takviye edilerek karıştırmalı döküm yöntemiyle kompozit malzemeler üretilmiştir. Daha sonra üretilen kompozitler üzerinde tornalama yöntemiyle, iki farklı kesici takım kullanılarak işlenebilirlik deneyleri yapılmıştır. Deneylerde 63, 94, 133 ve 196 m/min kesme hızları, 0,03 mm/rev ilerleme değeri ve 1 mm sabit kesme derinliği uygulanmıştır. İşlenen yüzeylerin pürüzlülük ölçümleri yapılmış, çıkan talaş şekillerine bakılmış ve kullanılan kesici takımların aşınma davranışları incelenmiştir. Sonuç olarak alüminyum matris içerisindeki MgO takviye parçacık boyutunun ve farklı kesici takımların, yüzey pürüzlülüğü, talaş şekli ve takım aşınmaları üzerinde çok önemli etkisi olmadığı görülmüştür. Yüzey pürüzlülüğünde en önemli etkiyi kesme hızındaki değişimler yapmıştır. Aynı şekilde kesme hızındaki değişimler, talaş şekilleri ve kesici takım aşınma davranışlarında da en etkili parametre olmuştur.

Keywords

• Metal matrisli kompozit
• Al 2024
• MgO tane boyutu
• Kesici takım cinsi
• Yüzey pürüzlülüğü
• Talaş şekli
• Takım aşınması
• Metal matrix composite
• MgO grain size
• Cutting tool type
• Surface roughness
• Chip shape
• Tool wear

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