Analisis Pengaruh Variasi Elektroda Pada Pengelasan Aluminium 5083 Dengan 6061 Terhadap Sifat Mekanik, Struktur Mikro, dan Prediksi Korosi

Rizki, Achmad Mikail (2018) Analisis Pengaruh Variasi Elektroda Pada Pengelasan Aluminium 5083 Dengan 6061 Terhadap Sifat Mekanik, Struktur Mikro, dan Prediksi Korosi. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Aluminium kerap digunakan untuk vessels hull, bodies of aircraft, rail road karena paduan aluminium memiliki sifat ringan, resistensi korosi yang baik, dan ductility yang baik. Tujuan penelitian ini untuk mengetahui dan mendapatkan pengaruh elektroda terhadap kekuatan tarik, kekerasan, pengamatan struktur makro-mikro, dan prediksi laju korosi pada pengelasan Aluminium seri 5083 dengan 6061. Adapun variasi elektroda yang digunakan adalah ER 5356, campuran ER 5356-ER 5556, dan ER 5556. Hasil uji kekuatan tarik menunjukkan bahwa pengelasan dengan elektroda ER 5556 menghasilkan kekuatan yield dan ultimate tertinggi yaitu 196.68 MPa dan 203.46 MPa. Pada uji kekerasan menunjukkan pengelasan dengan elektroda ER 5556 menghasilkan nilai kekerasan pada base metal (1), haz (2), weld metal (3), haz (4), dan base metal (5) berturut-turut 75.58 HVN, 79.59 HVN, 78.04 HVN, 73.59 HVN, 69.33 HVN. Hasil pengamatan struktur makro memiliki Panjang daerah haz yang relative sama. Sedangkan struktur mikro menunjukkan bahwa pengelasan menggunakan elektroda ER 5556 menghasilkan dendrit yang semakin rapat dan memperbanyak fase Mg2Si yang dapat meningkatkan kekuatan tarik dan kekerasan. Hasil prediksi laju korosi dengan metode sel tiga elektroda menunjukkan pengelasan dengan elektroda ER 5556 memiliki laju korosi yang paling sedikit yaitu 0.011 mmpy. ============ Aluminum is often used for hull vessels, bodies of aircraft, rail roads because aluminum alloys have light properties, good corrosion resistance, and good ductility. The purpose of this research is to know and get the effect of electrode to tensile strength, hardness, observation of macro-micro structure, and prediction of corrosion rate in welding of Aluminum series 5083 with 6061. Electrode variations used are ER 5356, mixed ER 5356-ER 5556, and ER 5556. Tensile strength test results show that welded specimen with ER 5556 electrode yields the highest yield and ultimate strength of 196.68 MPa and 203.46 MPa. In the hardness test of welded specimen with ER 5556 electrode resulted in hardness value on base metal (1), haz (2), weld metal (3), haz (4), and base metal (5) consecutively 75.58 HVN, 79.59 HVN, 78.04 HVN, 73.59 HVN, and 69.33 HVN. The result of macro structure observation has relatively similar length of haz area. While the microstructure shows that welded specimen using ER 5556 electrode produces more dense dendrites and more Mg2Si phase which can increase tensile strength and hardness. The result of prediction of corrosion rate with three cell electrode method shows welded specimen with ER 5556 electrode has the least corrosion rate of 0.011 mmpy.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Aluminium, vessels, hull, Gas Metal Arc Welding
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA418.74 Corrosion and anti-corrosives
T Technology > TA Engineering (General). Civil engineering (General) > TA462 Metals--Microbiology.
T Technology > TA Engineering (General). Civil engineering (General) > TA492.W4 Welded joints
T Technology > TC Hydraulic engineering. Ocean engineering > TC1665 Offshore structures--Materials.
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: Achmad Mikail Rizki
Date Deposited: 24 Aug 2018 05:36
Last Modified: 24 Aug 2018 05:36
URI: http://repository.its.ac.id/id/eprint/52231

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