Al7075 Alaşımına İlave Edilen Al-5Ti-1B Tane İncelticinin Yaşlanma, Mikroyapı, Sertlik ve Korozif Özellikleri Üzerindeki Etkisi

Abstract

Bu çalışmada, özellikle havacılık endüstrisi için kritik bir malzeme olan Al7075 alaşımına ağırlıkça %1 ve %2 oranında Al-5Ti-1B tane inceltici ilave edilerek 200 ℃’de 10 dakika, 1 saat, 2,5 saat, 5 saat ve 20 saat süre ile çökelme sertleşmesi ısıl işlemi uygulanmıştır. Tane inceltici ilave edilen ve edilmeyen tüm alaşımların mikroyapısal analizleri ile sertlik ve korozyon testleri gerçekleştirilmiştir. Elde edilen sonuçlardan alaşıma ilave edilen tane incelticinin alaşımın tane boyutunu ~%24 oranında azalttığı tespit edilmiştir. Bununla birlikte, tane inceltici ilave edilen alaşımların sertlik değerleri, çökelme sertleşmesi sonrası artış göstermiştir. Genel olarak tane inceltici ilave edilen alaşımların korozyon potansiyelleri, Al7075 alaşımına göre daha pozitif çıkmıştır. Benzer şekilde tane inceltici ilave edilen alaşımların korozyon akım yoğunluğu değerleri, Al7075 alaşımına göre daha düşük olarak ölçülmüştür.

Keywords

• Alüminyum 7075 alaşımı
• Al-5Ti-1B tane inceltici
• Çökelme sertleşmesi
• Sertlik
• Korozyon.

Kaynakça

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