PENGARUH VARIASI SUDUT KAMPUH V TERHADAP DISTORSI, KEKUATAN TARIK DAN STRUKTUR MIKRO HASIL PENGELASAN MIG (METAL INERT GAS) ALUMINIUM 7075 SEBAGAI MATERIAL RANGKA SAYAP PESAWAT TERBANG

Pius Hadianto Batu, Valerian (2023) PENGARUH VARIASI SUDUT KAMPUH V TERHADAP DISTORSI, KEKUATAN TARIK DAN STRUKTUR MIKRO HASIL PENGELASAN MIG (METAL INERT GAS) ALUMINIUM 7075 SEBAGAI MATERIAL RANGKA SAYAP PESAWAT TERBANG. Thesis thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Welding is a localized joining process of multiple metal rods using heat energy. Nowadays, over 40 welding methods have been utilized. One commonly employed welding technique is MIG (Metal Inert Gas) welding method. It is widely used across industries from infrastructure to aviation field. This research aimed to investigate the effects of varying the groove angle V on the angular distortion, tensile strength, and microstructure in the MIG welding using the American Welding Society (AWS) standard ER4043 electrode wire roll as the filler with argon gas as the shielding gas. The study employed Aluminum 7075 with a material thickness of 6 mm. The material was formed with the groove angle variations of 50°, 60°, and 70°. Test results revealed the differences in the material shape and tensile strength after welding with the various groove angles. The angular distortion test indicated that the 70° angle exhibits the greatest angular distortion at 0.40° while the smallest angular distortion occured at the 50° angle at 0.10°. Meanwhile, at the tensile testing revealed that the 70° angle achieved the highest tensile strength at 105,571 N/mm² and the lowest tensile strength was observed at the 50° angle with an average of 83,759 N/mm². The microstructure testing demonstrated that increasing the welding groove angle enhanced the quantity of Magnesium Silicide (Mg2Si) grains in the Aluminum 7075 welding material.

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