Investigation of Wear Performance of Different Amount SiC Reinforcements A356 Matrix Composite Materials Produced by Semi-Solid Process Method

Yıl 2020, , 1237 - 1243, 01.12.2020

İjlal Şimşek , Doğan Şimşek , Dursun Özyürek

https://doi.org/10.2339/politeknik.642506

Cited By: 2

Öz

In this study, the wear performance of A356 matrix
composite materials produced by different amount SiC reinforcement semi-solid
moulding method was investigated. In the A356 matrix, was added four different
amounts (5%, 10, 15 and 20) SiC. Composite powders mixed without ball (30
minutes) in the vibrating type mill were cold pressed (800 MPa) and green
compacts were produced. The produced green compacts, in 550 °C mold temperature
and in 600 °C furnace temperature, 100 MPa pressing force was pressed for 1 minute.
Produced samples were characterized with microstructure, hardness and
sphericity ratio. The wear tests were performed using a pin on-disk type wear
testing device with 0.2 ms^-1 sliding speed, under two different
loads (30 and 60 N) and at four different sliding distances (500 m, 1000, 1500
and 2000). As a result of the studies, the hardness increases with increasing
amount of SiC in the composite material, while the sphericity rates decrease.
As a result of the wear tests, while the highest weight loss, 5% SiC was
obtained, the lowest weight loss was obtained in 20% SiC additional composite
materials.

Anahtar Kelimeler

A356-SiC composite, wear, friction coefficient, semi-solid moulding

Yarı Katı Kalıplama Yöntemi İle Üretilen Farklı Miktarlarda SiC Takviyeli A356 Matrisli Kompozit Malzemelerin Aşınma Performansının İncelenmesi

Öz

Bu
çalışmada, farklı miktarlarda SiC ilave edilerek yarı katı kalıplama yöntemi
ile üretilen Al A356 matrisli kompozit malzemelerin aşınma davranışları
incelenmiştir. Al A356 matrise, ağırlıkça 4 farklı oranda (%5, 10, 15 ve 20)
SiC ilave edilmiştir. Titreşimli tip değirmende bilyesiz olarak (30 dakika)
karıştırılan tozlar, soğuk preslenerek (800 MPa) ham numuneler üretilmiştir.
Üretilen ham numuneler 550 °C kalıp sıcaklığı ve 600 °C fırın sıcaklığında 30
dakika ortam atmosferinde bekletilmiş ve 100 MPa basınç ile 1 dakika
preslenmiştir. Üretilen numuneler mikroyapı, sertlik ve küresellik oranı ile
karakterize edilmiştir. Aşınma testleri standart pin on-disk aşınma test
cihazında 0,2 ms^-1 kayma hızı, iki farklı yük (30 ve 60 N) ve dört
farklı aşınma mesafesi (500, 1000, 1500 ve 2000 m) kullanılarak yapılmıştır.
Yapılan çalışmalar sonucunda, kompozit malzeme içerisinde artan SiC miktarı ile
sertlik artarken, küresellik oranları ise azalmaktadır. Aşınma testleri
sonucunda en yüksek ağırlık kaybı %5 SiC içeren numunelerde elde edilirken, en
düşük ağırlık kaybı ise %20 SiC ilave kompozit malzemelerde elde edilmiştir.

Anahtar Kelimeler

A356-SiC kompozit, aşınma, sürtünme katsayısı, kompozit, yarı katı kaplama

Kaynakça

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