The Effect Of Vacuum Heat Treatment On Microstructural And Corrosion Properties Of CuAl10Ni5Fe3Mn Alloy

Yıl 2025, Cilt: 8 Sayı: 1, 1 - 6, 31.07.2025

Volkan Karakurt , Talip Çıtrak , Feyzanur Öztürk , Orçun Zığındere , Feriha Birol

https://doi.org/10.55581/ejeas.1500805

Öz

Nickel aluminum bronzes (NAB) are copper alloys widely used in critical applications in the defense, aerospace and marine industries. These alloys exhibit excellent properties such as wear resistance, corrosion resistance, impact strength, hardness and ductility, which are highly dependent on their composition and production conditions. Despite the relatively low formation of oxide layers on the surface of nickel aluminum bronze components under heat treatment conditions due to the high nickel content, there are special applications where the formation of oxide layers on the surface is undesirable. For this reason, the heat treatment of CuAl10Ni5Fe3Mn alloy was carried out in a vacuum furnace and the heat treatment process conditions in a non-vacuum muffle furnace were compared. For comparison purposes, the microstructure of the materials was examined and hardness and tensile tests and potentiodynamic corrosion tests were performed. It was determined that heat treatment in the muffle furnace led to a decrease in the proportion of the α phase and a higher formation of the β and κ phases compared to the heat treatment in a vacuum atmosphere. The material heat treated in the muffle furnace exhibited higher hardness and strength values as well as improved corrosion resistance compared to the material treated in the vacuum furnace.

Anahtar Kelimeler

Nickel Aluminum Bronze , Vacuum Furnace , Muffle Furnace , Microstructure Characterization , Potentiodynamic Corrosion Behavior

Vakum Isıl İşleminin CuAl10Ni5Fe3Mn Alaşımının Mikroyapısal ve Korozyon Özellikleri Üzerindeki Etkisi

Öz

Nikel alüminyum bronzları (NAB), savunma, havacılık ve denizcilik endüstrilerindeki kritik uygulamalarda yaygın olarak kullanılan bakır alaşımlarıdır. Bu alaşımlar, bileşimlerine ve üretim koşullarına büyük ölçüde bağlı olan aşınma direnci, korozyon direnci, darbe dayanımı, sertlik ve süneklik gibi mükemmel özellikler sergilerler. Yüksek nikel içeriği nedeniyle ısıl işlem koşullarında nikel alüminyum bronz bileşenlerin yüzeyinde nispeten düşük oksit katmanları oluşumuna rağmen, yüzeyde oksit katmanlarının oluşumunun istenmediği özel uygulamalar vardır. Bu nedenle CuAl10Ni5Fe3Mn alaşımının ısıl işlemi vakumlu fırında gerçekleştirilmiş ve vakumsuz kül fırınındaki ısıl işlem proses koşulları karşılaştırılmıştır. Karşılaştırma amacıyla malzemelerin mikro yapısı incelenerek sertlik ve çekme testleri ile potansiyodinamik korozyon testleri yapıldı. Kül fırınındaki ısıl işlemin, vakum atmosferindeki ısıl işleme kıyasla α fazının oranının azalmasına ve β ve κ fazlarının daha yüksek oluşumuna yol açtığı belirlendi. Kül fırınında ısıl işleme tabi tutulan malzeme, vakum fırınında işlem gören malzemeye göre daha yüksek sertlik ve mukavemet değerlerinin yanı sıra gelişmiş korozyon direnci sergilemiştir.

Anahtar Kelimeler

Nikel Alüminyum Bronzu , Vakum Fırını , Kül Fırını , Mikroyapı Karakterizasyonu , Potansiyodinamik Korozyon Davranışı

Kaynakça

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