Production of AA6061/TiB2/B4C/GNP hybrid surface composites processed by friction stir processing (FSP) and ınvestigation of mechanical properties

Öz

Bu çalışmada sürtünme karıştırma yöntemi ile AA6061 alüminyum alaşımı ve farklı oranlarda TiB2/Nano Grafen/B4C takviyeli hibrit yüzey kompozitleri üretilmiş ve mekanik özellikleri ile mikroyapı analizleri yapılmıştır. AA6061 altlığı üzerine 2 mm sabit aralıklarla 3 mm çapında ve 1.5 mm derinliğinde delikler açılmış, açılan bu deliklere farklı oranlarda karıştırılmış TiB2/Nano Grafen/B4C tozları doldurulmuştur. Takviye tozları ultrasonik ve mekanik olarak karıştırılmıştır. Sürtünme Karıştırma yöntemi ile 7 farklı takviye oranında hibrit yüzey kompoziti aynı profilde karıştırıcı uç kullanılarak sabit hızda üretilmiştir. Üretilen kompozitlerin çekme dayanımları, farklı yüklerdeki aşınma dirençleri ve sertlikleri belirlenmiştir. Ayrıca optik ve SEM mikroskoplar ile mikroyapı, kırık yüzey ve aşınma yüzeyi analizleri ile element haritalaması yapılmıştır. En düşük çekme dayanımı takviyesiz alaşımda elde edilirken TiB2, nano grafen ve B4C ilaveli yüzey kompozitlerin dayanımı artmıştır. Mikroyapılarda herhangi bir gözenek ve boşluk tespit edilmemiştir Kırık yüzeylerde takviye elemanı arttıkça gevrek kırılmaların meydana geldiği görülmüştür.

Anahtar Kelimeler

• AA6061
• TiB2
• B4C
• Graphene nano plated
• Hybrid
• Friction stir process
• Microstructure
• Hardness
• Mechanical testing
• Wear.

Sürtünme Karıştırma Yöntemi (SKY) ile İşlenmiş AA6061/TiB2/B4C/GNP Hibrit Yüzey Kompozitlerin Üretimi ve Mekanik Özelliklerinin İncelenmesi

Öz

Bu çalışmada sürtünme karıştırma yöntemi ile AA6061 alüminyum alaşımı ve farklı oranlarda TiB2/Nano Grafen/B4C takviyeli hibrit yüzey kompozitleri üretilmiş ve mekanik özellikleri ile mikroyapı analizleri yapılmıştır. AA6061 altlığı üzerine 2 mm sabit aralıklarla 3 mm çapında ve 1.5 mm derinliğinde delikler açılmış, açılan bu deliklere farklı oranlarda karıştırılmış TiB2/Nano Grafen/B4C tozları doldurulmuştur. Takviye tozları ultrasonik ve mekanik olarak karıştırılmıştır. Sürtünme Karıştırma yöntemi ile 7 farklı takviye oranında hibrit yüzey kompoziti aynı profilde karıştırıcı uç kullanılarak sabit hızda üretilmiştir. Üretilen kompozitlerin çekme dayanımları, farklı yüklerdeki aşınma dirençleri ve sertlikleri belirlenmiştir. Ayrıca optik ve SEM mikroskoplar ile mikroyapı, kırık yüzey ve aşınma yüzeyi analizleri ile element haritalaması yapılmıştır. En düşük çekme dayanımı takviyesiz alaşımda elde edilirken TiB2, nano grafen ve B4C ilaveli yüzey kompozitlerin dayanımı artmıştır. Mikroyapılarda herhangi bir gözenek ve boşluk tespit edilmemiştir Kırık yüzeylerde takviye elemanı arttıkça gevrek kırılmaların meydana geldiği görülmüştür.

Anahtar Kelimeler

• AA6061
• TiB2
• B4C
• Graphene nano plated
• Hybrid
• Friction stir process
• Microstructure
• Hardness
• Mechanical testing
• Wear.

Kaynakça

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