Al metal matris kompozitlerin abrasiv aşınma performansına takviye elemanlarının etkisi

Bu çalışmada, bir Al-Si-Mg alaşımına ağırlıkça % 5, 10 ve 15 oranlarında SiC, Al2O3 ve FeCrC partikülleri ilave edilerek üretilen Al metal matrisli kompozit malzemelerin (MMK) abrasiv aşınma davranışları incelenmiştir. Kompozit malzemeler karıştırmalı döküm tekniğiyle üretilmiştir. Abrasiv aşınma deneyleri, bir pin on disk test cihazında 1.89 m/s kayma hızında ve 10-30 N yük altında gerçekleştirilmiştir. Ayrıca, üretilen matris alaşımı ve kompozit malzemelerin optik mikroskop, taramalı elektron mikroskobu (SEM) ve EDS çalışmaları yapılmıştır. Test sonuçları incelendiğinde, matris alaşımının aşınma değerinin kompozit malzemelerin aşınma değerlerine göre oldukça yüksek olduğu tespit edilmiştir. Bunun yanı sıra, tüm MMK numunelerinde, artan yükle birlikte aşınma miktarının da arttığı, ancak maksimum yükte FeCrC partiküllerinin matrisi plastik olarak deforme ettiği belirlenmiştir.

Effect of particle reinforcements on abrasive wear performance of aluminum metal matrix composites

In this work, the effect of SiC, Al2O3 and FeCrC particulate reinforcement (5, 10 and 15 w.t. %) on the abrasive wear behaviour of aluminum metal matrix composites (MMCs) have been investigated. The composite materials and Al-Si-Mg matrix alloy have been processed using stir-casting technique. Wear tests have been carried out using a pin-on-disc aparatus at 10-30 N loads and 1.89 m/s sliding speed. Besides, the optical, SEM microscope and EDS studies of both matrix alloy and composite materials have been carried out. According to the test result, it is observed that the wear rate of matrix alloy is higher than the wear rate of the composite materials. However, increasing applied load increased the wear rate in the all MMCs. But, it is observed that FeCrC particles are plastically deformed to the matrix at maximum load.

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