Alüminyum Magnezyum Alaşımlarının Sürtünme Karıştırma Kaynağı İle Kaynak Edilebilirliğinin Değerlendirilmesi

Yıl 2017, Cilt: 5 Sayı: 2, 191 - 209, 25.06.2017

Musa Bilgin , Şener Karabulut , Ahmet Özdemir

Öz

Hava, kara ve deniz taşımacılığında
kullanılan araçlarda sera gazı emisyonlarını azaltmanın ve enerji korunumu
artırmanın en iyi yollarından biri alüminyum ve magnezyum gibi daha hafif ve dayanıklı
malzemeler kullanmaktır. Fakat her iki metalin klasik ergitme kaynak yöntemleri
ile birleştirilmelerinin zor olması ve özel işlem gerektirmeleri Al ve Mg
alaşımlarının ortak yapılarda kullanımlarını sınırlandırmıştır. Bu çalışmada
sürtünme karıştırma kaynak (SKK) yöntemi kullanılarak Al/Mg alaşımlarının
birleştirilmesiyle ilgili yapılan çalışmalar değerlendirilerek, SKK yönteminin
de kullanılan değişkenlerin (ilerleme hızı, devir sayısı, eğim açısı, eksenel
dalma kuvveti, takım tasarımı, takım kaydırma mesafesi ve malzemelerin
pozisyonları); kaynak kalitesi, mikro yapı ve mekanik özellikler üzerine
etkileri incelenmiştir. Al/Mg malzeme çiftinin SKK yöntemi ile
birleştirilmesinde kaynak kalitesini etkileyen en önemli unsur birleşme
bölgesinde oluşan gevrek yapıdaki Al3Mg2 (β) ve Al12Mg17 (γ)
intermetalik bileşiklerdir. Al/Mg alaşımların SKK yöntemi ile
birleştirilmesinde kaynak bölgesinin çekme dayanımı, ana metal Al alaşımının çekme
dayanımının % 60 üstünde oluşabilmektedir.

Anahtar Kelimeler

Alüminyum alaşımı, Magnezyum alaşımı, Sürtünme karıştırma kaynağı

Destekleyen Kurum

Gazi Üniversitesi Bilimsel Araştırma Projeleri Birimi

Proje Numarası

59/2016-01

Teşekkür

Bu çalışma, Gazi Üniversitesi Bilimsel Araştırma Projeleri Birimi tarafından “BAP 59/2016-01” kodlu proje ile desteklenmiştir. Desteklerinden dolayı Gazi Üniversitesine teşekkür ederiz.

Kaynakça

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