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Friction Stir Welding (FSW) is a solid state welding process used for welding similar and dissimilar materials. This welding technique allows welding of Aluminum alloys which present difficulties in fusion joining and allows different material couples to be welded continuously. In this study, 1050 aluminum alloy and commercially pure copper to increase heat input were produced at high rotation rate (2440 rev/min) with four different pin position (0-1-1.5-2 mm) and three different weld speeds (20-30-50 mm/min) by friction stir welding. The influence of welding parameters on microstructure and mechanical properties of the joints was investigated. Tensile and bending tests and microhardness measurements were used to determine of mechanical properties. Nugget zone microstructures were investigated by optical microscope and scanning electron microscope (SEM) and were analyzed in energy-dispersive X-ray spectroscopy (EDX). Depending on the XRD analysis results intermetallic phase was observed to form in the interfacial region. In the tensile test results, 83.55% weld performance was obtained in the friction stir welding merge of Al-Cu.

Sürtünme karıştırma kaynağı (SKK) aynı veya farklı cins malzemelerin birleştirilmesinde kullanılan katı hal birleştirme yöntemidir. Bu yöntem, ilk olarak ergitme kaynak teknikleri ile birleştirilmesinde zorluklarla karşılaşılan alüminyum alaşımlarının birleştirilmesinde kullanılmış olmakla beraber günümüzde farklı malzeme çiftlerinin başarılı bir şekilde birleştirilmesine de olanak vermektedir. Bu çalışmada, alüminyum (AA1050) ve bakır levhalar, ısı girdisini arttırmak amacı ile yüksek takım dönme hızında (2440 dev/dk.), üç farklı kaynak hızlarında (20, 30, 50 mm/dk.) ve dört farklı takım konumlandırmasında (0-1-1.5-2 mm) SKK ile birleştirilmiştir. Kaynak parametrelerinin mekanik ve mikroyapı özeliklerine etkisi incelenmiştir. Mekanik özelliklerinin tespiti amacıyla çekme ve eğme testleri ile mikrosertlik ölçümleri yapılmıştır. Kaynak bölgesi mikroyapıları, optik mikroskop ve taramalı elektron mikroskobu (SEM) ile incelenmiş ve EDX analizleri yapılmıştır. Kaynak bölgesinde meydana gelen fazları incelemek için yapılan XRD analiz sonuçlarında intermetalik fazlar tespit edilmiştir. Sürtünme karıştırma kaynağı yapılmış Al-Cu parçaların çekme testi sonuçlarında %83.55 kaynak performansı elde edilmiştir.

Friction StirWelding (FSW) is a solid-state welding process used for welding similar and dissimilar materials. FSW is especially suitable to join sheet Al alloys, and this technique allows different material couples to be welded continuously. In this study, 1050 Al alloys and commercially pure Cu were produced at three different tool rotation speeds (630, 1330, 2440 rpm) and three different tool traverse speeds (20, 30, 50 mm/min) with four different tool position (0, 1, 1.5, 2 mm) by friction stir welding. The influence of the welding parameters on the microstructure and mechanical properties of the joints was investigated. Tensile and bending tests and microhardness measurements were used to determine the mechanical properties. The microstructures of the weld zone were investigated by optical microscope and scanning electron microscope (SEM) and were analyzed in an energy dispersed spectrometer (EDS). Intermetallic phases were detected based on the X-ray diffraction (XRD) analysis results that evaluated the formation of phases in the weld zone. When the welding performance of the friction stir welded butt joints was evaluated, the maximum value obtained was 89.55% with a 1330 rpm tool rotational speed, 20 mm/min traverse speed and a 1 mm tool position configuration. The higher tensile strength is attributed to the dispersion strengthening of the fine Cu particles distributed over the Al material in the stir zone region. [ABSTRACT FROM AUTHOR]

Friction Stir Welding (FSW) is a solid state welding process used for welding similar and dissimilar materials. This welding technique allows welding of Aluminum alloys which present difficulties in fusion joining and allows different material couples to be welded continuously. In this study, 1050 aluminum alloy and commercially pure copper to increase heat input were produced at high rotation rate (2440 rev/min) with four different pin position (0-1-1.5-2 mm) and three different weld speeds (20-30-50 mm/min) by friction stir welding. The influence of welding parameters on microstructure and mechanical properties of the joints was investigated. Tensile and bending tests and microhardness measurements were used to determine of mechanical properties. Nugget zone microstructures were investigated by optical microscope and scanning electron microscope (SEM) and were analyzed in energy-dispersive X-ray spectroscopy (EDX). Depending on the XRD analysis results intermetallic phase was observed toform in the interfacial region. In the tensile test results, 83.55% weld performance was obtained in the friction stir welding merge of Al-Cu. [ABSTRACT FROM AUTHOR]

Friction Stir Welding (FSW) is a solid-state welding process used for welding similar and dissimilar materials. FSW is especially suitable to join sheet Al alloys, and this technique allows different material couples to be welded continuously. In this study, 1050 Al alloys and commercially pure Cu were produced at three different tool rotation speeds (630, 1330, 2440 rpm) and three different tool traverse speeds (20, 30, 50 mm/min) with four different tool position (0, 1, 1.5, 2 mm) by friction stir welding. The influence of the welding parameters on the microstructure and mechanical properties of the joints was investigated. Tensile and bending tests and microhardness measurements were used to determine the mechanical properties. The microstructures of the weld zone were investigated by optical microscope and scanning electron microscope (SEM) and were analyzed in an energy dispersed spectrometer (EDS). Intermetallic phases were detected based on the X-ray diffraction (XRD) analysis results that evaluated the formation of phases in the weld zone. When the welding performance of the friction stir welded butt joints was evaluated, the maximum value obtained was 89.55% with a 1330 rpm tool rotational speed, 20 mm/min traverse speed and a 1 mm tool position configuration. The higher tensile strength is attributed to the dispersion strengthening of the fine Cu particles distributed over the Al material in the stir zone region.