Analisis Kekuatan Tarik Aluminium 5083 Hasil Pengelasan Gmaw Posisi 1g Dengan Variasi Kuat Arus Dan Debit Aliran Gas Pelindung

Abstract

Abstrak: Tujuan penelitian ini untuk mengetahui kekuatan tarik aluminium 5083 hasil pengelasan GMAW dengan pengelasan posisi 1G dengan variasi kuat arus dan debit aliran gas pelindung. Metode penelitian yang digunakan adalah penelitian eksperimental dengan variasi kuat arus sebesar 90, 125, dan 160 A dan debit aliran gas pelindung sebesar 14 L/menit dan 16 L/menit. Pengujian kekuatan tarik sampel dilakukan dengan standar uji ASTM E 8M-04. Hasil pengelasan menunjukkan variasi aliran gas pelindung mempengaruhi kekuatan tarik. Kekuatan tarik tertinggi dan terendah berturut-turut adalah 21,04 kg/mm 2 dan 9,14 kg/mm 2 yang diperoleh dari pengelasan dengan arus 125A dan 90A dengan debit aliran gas pelindung 16 L/menit dan 14 L/menit. Bentuk patahan aluminium 5083 dengan pengelasan arus 90A dan aliran gas 14L/menit menunjukkan perpatahan getas.Kata-kata Kunci: variasi kuat arus, debit aliran gas pelindung, las GMAW, aluminium 5083, Posisi 1G Abstract: The Analysis of Tensile Strength of Aluminium 5083 that Welded by GMAW with 1G Position with Variation of Electric Current and Gas Flow Rate.The purpose of this study was to determine the tensile strength of 5083 aluminum GMAW welding results with a welding position 1G with strong variations in flow and the flow of protective gas. The method used was experimental research with variations in current of 90, 125, and 160 A and shielding gas flow rate of 14 L/min and 16 L/min. The tensile strength of samples was testedusing the test standard ASTM E 8M-04. Welding results showed that variations in protective gas flow affected tensile strength. The highest and lowest tensile strength was 21.04 kg/mm2 and 9.14 kg/mm2 respectively, obtained from welding currents of 125A and 90A with protective gas flow rates of 16 L/min and 14 L/min. The 5083 aluminum with a welding current of 90A and gas flow of 14L/min had a brittle fracture.

An Effect of Electric Current Variations and Wire Feed Rate on Low Carbon Steels Toward Tensile Strength on The Result of Gas Metal Arc Welding

“…In addition to the use of wire feed rate, the use of electric currents is also considered to greatly affect the welding strength. This is in accordance with research conducted by [4] obtained the results that variations in electric current in aluminum welding 5083 position 1G GMAW welding effect on tensile strength. The results of suitable welding of suitable currents can produce excellent welding quality and have a high average tensile strength.…”

“…Large grain shape will cause a decrease in the strength of a material. This is in line with the theory put forward by [4] where the material will have high strength if it has small grain boundaries. Because the small grain shape is able to withstand the movement of the dislocations so as to possess great strength.…”

Pengaruh Kuat Arus Pengelasan Gmaw Terhadap Kedalaman Penetrasi Dan Kekerasan Baja St-37 Pada Daerah Heat Affected Zone

“…Perbedaan kuat arus dapat menyebabkan terjadi perbedaan sifat-sifat terutama mechanical properties yang terbentuk. Semakin tinggi arus yang digunakan, maka semakin tinggi pula kedalaman penetrasi serta kecepatan pencairan, terutama pada daerah heat affected zone (HAZ) [2]. Penetrasi standar harus memperhatikan tipis dan tebalnya hasil lasan secara visual, yang pada akhirnya apabila tidak diperhatikan dapat mengakibatkan terjadinya crack bahkan patah pada hasil sambungan.…”