Sıcak Presleme Yöntemi ile Üretilen AA2024 ve AA7075 Esaslı %5 SiC Takviyeli Kompozit Malzemelerin Mikroyapı, Sertlik ve Korozyon Özelliklerinin İncelenmesi

Year 2021, Volume: 13 Issue: 1, 104 - 112, 18.01.2021

Hasan Karabulut , Kubilay Karacif , Mustafa Türkmen

https://doi.org/10.29137/umagd.733755

Cited By: 1

Abstract

Bu çalışmada sıcak izostatik presleme ile üretilen AA2024 ve AA7075 alüminyum alaşımı ana malzeme ve %5 SiC takviye içeren iki farklı kompozit malzemenin mikroyapı, sertlik ve korozyon özellikleri incelenmiştir. Toz metalürjisi yönteminin kullanıldığı malzeme üretiminde AA2024 ve AA7075 alaşım tozlarına %5 SiC parçacık takviyesi yapılarak üç eksenli karıştırıcıda harmanlama işleminin ardından sıcak izostatik presleme yöntemi ile iki farklı kompozit malzeme elde edilmiştir. Sıcak izostatik presleme işlemleri 410 °C sıcaklıkta ve 45 MPa basınç altında gerçekleştirilmiştir. Üretilen kompozit malzemelerin mikroyapı, yoğunluk, sertlik ve korozyon özellikleri belirlenmiştir. Mikroyapı incelemelerinde SiC parçacıklarının matris içerisinde homojen dağılım gösterdiği, sertlik sonuçlarına göre AA7075 alüminyum alaşımı esaslı kompozit malzemede sertliğin dolayısıyla mekanik dayanımın daha yüksek olduğu görülmüştür. Fakat bu kompozit malzemenin tuzlu su ortamındaki korozyon dayanımının AA2024 alüminyum alaşımı esaslı kompozit malzemeye göre daha düşük olarak belirlenmiştir.

Keywords

AA2024, AA7075, Kompozit, Korozyon

Investigation of Microstructure, Hardness and Corrosion Properties of AA2024 and AA7075 based 5% SiC Reinforced Composite Materials Produced by Hot Pressing Method

Abstract

In this study, microstructure, hardness and corrosion properties of AA2024 and AA7075 aluminum based composite materials reinforced with 5% SiC were investigated. The composite materials were produced by hot isostatic pressing method. Two different composite materials were obtained by using hot isostatic pressing method after blending in a three-axis mixer by using 5% SiC particle reinforcement to AA2024 and AA7075 alloy powders in the production of materials using powder metallurgy method. Hot isostatic pressing processes were carried out at 410 °C and 45 MPa pressure. Microstructure, density, hardness and corrosion properties of the composites were investigated. In microstructure studies, it was observed that SiC particles showed homogeneous distribution in the matrix, and in hardness studies, AA7075 aluminum alloy-based composite material had higher hardness and therefore mechanical strength. However, the corrosion resistance of this composite material in salt water environment is determined to be lower than AA2024 aluminum alloy composite material.

Keywords

AA2024, AA7075, Composite, Corrosion

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