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Öğe Sürtünme kaynağı ile birleştirilen paslanmaz ve ıslah çeliklerinin mekanik ve mikroyapılarının araştırılması(Batman Üniversitesi Lisansüstü Eğitim Enstitüsü, 2023-08-01) Binici, Sinan; Çetkin, EdipSürtünme kaynağı; sürtünme süresi, sürtünme basıncı, dönme devri, yığma basıncı ve yığma süresi parametreleri kullanılarak birleştirilmesi zor veya mümkün olmayan iki farklı veya aynı türden malzemenin birleştirmesinde kullanılan bir kaynak yöntemidir. Yapılan çalışmada, AISI 316L paslanmaz çeliği ile AISI 4340 ıslah çeliği, sürtünme kaynağı yöntemi ile 3 farklı dönme devri (2000, 2200, 2400 dev/dak) ve 3 farklı sürtünme süresi (3, 5, 7 sn) parametreleri kullanılarak birleştirilmiştir. Kaynak parametrelerin birleşmeler üzerindeki etkilerini belirlemek için mekanik testler ve mikroyapı incelemeleri yapılmıştır. Ayrıca numunelerin flanş çaplarındaki artış ve boyca kısalma değişimleri de ölçülmüştür. Çalışma sonucunda; kaynaklı numunelerin makro ve mikro görüntüleri incelendiğinde kaynaklı birleşmelerde herhangi bir boşluklu yapı gözlemlenmemiştir. Flanş çapı ve boyca kısalma değişimi, en yüksek devir ve en yüksek sürtünme süresi ile yapılan birleştirmede meydana gelmiştir. En yüksek flanş çapı 19.44 mm ve en fazla boyca kısalma 6.12 mm olarak ölçülmüştür. Mikrosertlik değerleri; sürtünme süresi ve dönme devrine paralel olarak artmıştır. Numunelerin tamamı içerisinde en yüksek mikrosertlik değeri 771,9 HV ve en düşük mikrosertlik değeri 673 HV olarak ölçülmüştür. Sürtünme süresinin minimum ve dönme devrinin maksimum olduğu numunede çekme testi en iyi sonucu vermiştir. Maksimum çekme kuvveti 45726,56 N ve maksimum uzama miktarı 14,532 mm olarak ölçülmüştür. Maksimum burulma torku 84,96 Nm ve maksimum burulma açısı 1850,700 olarak ölçülmüş, böylece en fazla sürtünme süresi ve en az dönme devrinde burulma testi sonuçları içerisinde optimum sonuca ulaşılmıştır.Öğe Friction welding of dissimilar AISI 304 and AISI 8640 steels(European Journal of Technique (EJT), 2016-08-01) Batı, Serkan; Kılıç, Musa; Kırık, İhsanThis study investigates the joinability of AISI 8640 heat treatable steel and AISI 304 austenitic stainless steel combined with friction welding. These steels have completely different properties and widely used in industrial applications. Welding is applied on steels with the parameters of 1800 rev/min turning speed, 50 MPa friction pressure and 2, 4, 6, 8 and 10 sec friction time by using continuously driven friction welding machine. After the welding process, tensile and hardness testing applied to determine tensile and hardness strength of welded samples. Additionally, in order to determine the microstructural features, research using the optical microscope, scanning electron microscope (SEM) with Energy-dispersive Xray spectroscopy (EDS) analysis tests were done. According to the information derived from the results, AISI 304 and AISI 8640 steels joined with friction welding without any problemÖğe Microstructure and mechanical properties of armor 500/AISI2205 steel joint by friction welding(Journals & Books, 2017-08) Batı, Serkan; Kırık, İhsan; Sarsılmaz, FurkanThis paper discussed the properties of friction welded joint of Armor 500 steel and duplex (ferritic/austenitic) steel AISI 2205 and compared the properties of weld at different welding parameters. The experimental study was conducted with the welding parameters such as friction pressure and friction time. The experimental results indicated that armor 500 steel could be joined to AISI 2205 steel using the traditional friction welding technique. The processed joints were tested through axial tension test. In addition, the highest tensile strength, which is 1020 MPa is obtained when friction time is 8 s and friction pressure is 80 MPa. The microstructures of the alloys and fracture surfaces were examined by optical and scanning electron microscopy. Experimental results indicate that microstructural and mechanical properties are significantly affected by changing welding parameters within the chosen range of conditions.Öğe Friction welding of dissimilar AISI 304 and AISI 8640 steels(Dicle Üniversitesi, 2016) Batı, Serkan; Kılıç, Musa; Kırık, İhsanThis study investigates the joinability of AISI 8640 heat treatable steel and AISI 304 austenitic stainless steel combined with friction welding. These steels have completely different properties and widely used in industrial applications. Welding is applied on steels with the parameters of 1800 rev/min turning speed, 50 MPa friction pressure and 2, 4, 6, 8 and 10 sec friction time by using continuously driven friction welding machine. After the welding process, tensile and hardness testing applied to determine tensile and hardness strength of welded samples. Additionally, in order to determine the microstructural features, research using the optical microscope, scanning electron microscope (SEM) with Energy-dispersive X-ray spectroscopy (EDS) analysis tests were done. According to the information derived from the results, AISI 304 and AISI 8640 steels joined with friction welding without any problemsÖğe Optimization of welding parameters of AISI 431 and AISI 1020 joints joined by friction welding using taguchi method(Bilecik Şeyh Edebali Üniversitesi, 2022-06-30) Adin, Mehmet Şükrü; İşcan, Bahattin; Baday, ŞehmusMartensitic stainless steel AISI 431 and low carbon steel AISI 1020 are materials used together in many different industries. However, important problems are encountered when welding (fusion welding) these materials to each other. For this reason, friction welding process (Solid-state welding) is used to join these dissimilar metals. There are very few studies on joining these materials with friction welding. Therefore, the optimization of the welding parameters used in joining these dissimilar steel pairs with friction welding is of great important. In addition, the effects of the factors dependent on friction welding parameters need to be well understood. In this study, AISI 431 and AISI 1020 steel bars were successfully joined by friction welding, and the effects of welding parameters on tensile strength and axial shortening were investigated, and welding parameters were optimized using Taguchi method to obtain quality weld joints. The experimental results of the study showed that the highest tensile strength (573.32 MPa) of the joints was 54.53%, higher than the lowest tensile strength (370.99 MPa), the highest axial shortening (23.18 mm) was 650.16%, higher than the lowest axial shortening (3.09 mm). The optimal parameters for average axial shortening and average tensile strength were determined as A3B1C3 and A3B3C2; and the highest percentage contribution values for axial shortening and tensile strength were found to be 51.55% (rotating speed) and 63.90% (rotating speed); and R2 values for the average axial shortening and average tensile strengths were found to be 97% and 99.3%, respectively.Öğe Investigation of optimum friction welding parameters and energy consumption for Ramor 500 and AISI 420 steels(Batman Üniversitesi, 2022-07-02) Adin, Mehmet ŞükrüRamor steels are widely used materials in the defence and automotive industries due to their superior strength to high-speed impacts. However, many problems are encountered during the use of traditional fusion welds, which are applied to join these steel types with dissimilar metal materials. Therefore, in recent years, friction welding known as solid state welding method has attracted attention instead of traditional melting welding. In this experimental study, the effects of different welding parameters applied during friction welding of Ramor 500 and AISI 420 rod materials on the tensile strength of the joints were examined and the most suitable welding parameters were investigated. In addition, the optimum power requirement for energy saving has been examined. It was found that the lowest tensile strength was 575 MPa for 5 seconds friction time and 45 MPa friction pressure parameters, while the highest tensile strength was 633 MPa for 7 seconds friction time and 55 MPa friction pressure parameters. It was observed that the lowest consumed power was 1.44 kW at 5 seconds friction time and 45 MPa friction pressure, while the highest consumed power was 2.45 kW at 9 seconds friction time and 55 MPa friction pressure. Thanks to the obtained data, the optimum power requirement was determined and 10% energy saving was achieved.
