AISI 1040 ve AA6013 malzeme çiftinin mekanik kilitleme yönteminde (MLM) farklı bağlantı açıları kullanılarak birleştirilmesi

Farklı malzeme türlerinin birleştirilerek kullanılmasının zorunlu olduğu birçok endüstriyel uygulama bulunmaktadır. Ancak kaynak, döküm, yapıştırma gibi diğer birleştirme yöntemleri ile bu her zaman mümkün olmamakta ya da çeşitli problemler ortaya çıkarmaktadır. Bu problemlerin ortadan kaldırılması amacıyla klasik birleştirme yöntemlerine alternatif olarak yeni ve çevreci bir yöntem olan mekanik kilitleme yöntemi (MLM) kullanılmaktadır. MLM yöntemi özellikle farklı kimyasal ve fiziksel özelliklere sahip malzeme çiftlerinin birleştirilmesinde kullanılabilir. Bununla birlikte yüksek ısı girdisinin neden olduğu mikro yapı hatalarının azaltılması istenen durumlarda tercih edilebilir. Bu çalışmada; MLM için bağlantı kalitesini doğrudan etkileyen bağlantı açısının mikro yapı ve mekanik özelliklerle olan etkisi araştırılmıştır. Bu amaçla; AISI 1040 çelik ve AA6013 alüminyum alaşımı MLM yöntemi ile farklı bağlantı açıları (7°,10° ve 13°) kullanılarak birleştirilmiştir. Birleştirme işlemi sonrasında mikro yapı incelemesi, mikro sertlik ölçümleri ile çekme testleri yapılarak bağlantı performansı belirlenmiştir. Çalışma sonunda 13° bağlantı açısı ile hazırlanan numunelerde 241,38 MPa değer ile en yüksek mekanik özellikler elde edilmiştir. Bağlantı açısının daha düşük olduğu diğer numunelerde ise bağlantıyı gerçekleştiren flanş oluşumunun düzensiz dağılım gösterdiği, malzeme akışının yetersiz olduğu bunun sonucunda mekanik özelliklerin düştüğü tespit edilmiştir.

Anahtar Kelimeler:

Mekanik kilitleme yöntemi, AISI 1040, AA6013, mekanik özellikler, metalürjik özellikler

Joining of AISI 1040 and AA6013 material pairs by mechanical locking method (MLM) using different connection angle

There are many industrial applications where different types of materials must be combined and used. However, this is not always possible with welding, bonding and other disassembling methods or it contains various problems. In order to eliminate these problems, mechanical locking method (MLM), which is a new and environmentally friendly method, is used as an alternative to classical joining methods. MLM method can be used especially in joining material pairs with different chemical and physical properties.However, it can be preferred in situations where it is desired to reduce microstructure defects caused by high heat input. In this study; For MLM method, the effect of the connection angle, which can directly affect the joining quality, on the microstructure and mechanical properties was investigated. For this purpose, AISI 1040 steel and AA6013 aluminum alloy were joined at different connection angles (7°, 10° and 13°) using the MLM method. After the joining process, microstructure analysis, microhardness measurements and tensile tests were performed and the connection performance was determined. At the end of the study, the highest mechanical properties were obtained with a value of 241.38 MPa in the samples prepared with 13° connection angle. An other samples where the connection angle was lower, it was determined that the flange formation performing the connection showed an irregular distribution, the material flow was insufficient and the mechanical properties decreased as a result.

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