Investigation of Mechanical Properties of 6061 Aluminum Alloy Sheets Welded by Friction Stir Welding

Yıl 2023, , 167 - 178, 30.12.2023

Çetin Batuk , Hüseyin Demirtaş

https://doi.org/10.52795/mateca.1393930

Öz

Friction stir welding (FSW) is a welding method in which a tool with a tip and shoulder designed in different forms rotates along the parts placed butt, lap or in different positions. It is also a solid-state joining technique that offers good mechanical properties in the weld area. Due to its significant advantages, the FSW combining method has been developing in recent years, and its development, research and use are constantly increasing. It has been observed that this joining method is increasingly used in various aluminium alloy materials that have problems such as hot cracking, porosity and distortion when joining with other welding methods. In this study, butt joints of AA6061-T6 sheets (0.5mm-6mm), which are frequently used in the defence and aerospace industry, were examined in terms of tensile strength. For this purpose, 17 different data sources were examined in terms of tensile strength and evaluated statistically. As a result of the studies, it was determined that the joint strengths were distributed in the range of 30-90% compared to the sheet strengths used, but the median values were collected in the range of 60-70%. It was determined that the average strength of 6 mm sheets, which were most frequently used in the studies, was around 75%. It has been observed that design and tool geometry are the most important parameters in joints.

Anahtar Kelimeler

Friction Stir, Welding, FSW, AA6061-T6

Sürtünme Karıştırma Kaynağı ile Birleştirilmiş 6061 Alüminyum Alaşımlı Sacların Mekanik Özellikler Yönünden İncelenmesi

Öz

Sürtünme karıştırma kaynağı (SKK), farklı formlarda tasarlanmış uç ve omuza sahip olan takımın alın, bindirme veya farklı pozisyonlarda yerleştirilen parçaların boyunca dönerek ilerlediği bir kaynak yöntemidir. Aynı zamanda kaynak bölgesinde iyi mekanik özellikler sunan katı hal birleştirme tekniğidir. Önemli avantajlarından dolayı SKK birleştirme yöntemi son yıllarda gelişmekte olup geliştirme, araştırma ve kullanılması sürekli artış göstermektedir. Diğer kaynak yöntemleri ile birleştirilmesinde sıcak çatlama, porozite ve çarpılma gibi problemler yaşanan çeşitli alüminyum alaşım malzemelerde bu birleştirme yönteminin artarak kullanıldığı görülmüştür. Bu çalışmada savunma ve havacılık sanayinde sıklıkla kullanılan AA6061-T6 sacların (0.5mm-6mm) SKK ile alın birleştirmeleri çekme dayanımı yönünden incelenmiştir. Bu amaçla 17 farklı çalışma verisi çekme mukavemetleri yönünden incelenmiş ve istatistiksel olarak değerlendirilmiştir. Çalışmalar neticesinde birleştirme mukavemetlerinin kullanılan sac mukavemetlerine oranla %30-90 aralığında dağılmakla birlikte medyan değerlerinin %60-70 aralığında toplandığı tespit edilmiştir. Çalışmalarda en sık kullanılan 6 mm saclarda ise ortalama mukavemetlerin %75 civarında olduğu belirlenmiştir. Birleştirmelerde tasarımın ve takım geometrisinin en önemli parametreler olarak öne çıktığı görülmüştür.

Anahtar Kelimeler

Sürtünme Karıştırma, kaynak, SKK, AA6061-T6

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