Alfisyahri, Muhammad Tanasha (2019) Analisis Pengaruh Variasi Sudut Groove dan Heat Input Pengelasan FCAW pada Weldjoint Baja ASTM A36 terhadap Uji Bending dan Sifat-sifat Mekanik. Undergraduate thesis, Institut Teknologi Sepuluh Nopermber.
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Abstract
Dalam pembuatan dan pembangunan kontruksi lepas pantai khususnya untuk offshore structure pasti berkaitan dengan proses penyambungan plat yang disebut proses pengelasan. Pengelasan merupakan suatu peranan penting dalam susunan pembuatan bangunan lepas pantai khususnya penyambungan plat-plat geladak offshore. Penelitian ini merupakan penggunaan baja ASTM A36 dengan metode FCAW dan elektroda yang digunakan ialah E 71T-1. Penelitian memiliki variasi sudut groove sebesar 70 derajat dan 55 derajat dan variasi heat input sebesar 120 Ampere, 150 Ampere, dan 180 Ampere . Pada hasil uji tekuk menunjukkan pada pengelasan dengan variasi 120 Ampere dan sudut groove 70 derajat tidak terdapat open defect maupun crack. Dan pada hasil uji tarik menunjukkan nilai kekuatan yield strength dan ultimate strength tertinggi pada variasi 180 Ampere dan sudut groove 55 derajat yaitu 411,5 Mpa dan 546,86 MPa. Dan yang terakhir dalam pengamatan uji mikro pengelasan dengan variasi sudut 70 derajat memiliki persentase struktur ferrite terbesar pada weld metal dan ada pada variasi ampere 120 Ampere sebesar 80,0% sedangkan untuk persentase struktur pearlite yang terbentuk sebesar 20,0%.=====================================================================================================================================================================
In the manufacture and construction of offshore construction, especially for offshore structures, it must be related to the plate connection process called the welding process. Welding is an important role in the arrangement of offshore construction, especially the connection of offshore deck plates. This study is the use of ASTM A36 steel with the FCAW method and the electrode used is E 71T-1. The study has variations in groove angles of 70 degree and 55 degree and variations in heat input of 120 Amperes, 150 Amperes, and 180 Amperes. The results of the buckling test show welding with 120 Ampere variations and groove angles of 70 degree there are no open defects or cracks. And the results of the tensile test show the highest value of yield strength and ultimate strength in the 180 Ampere variation and 55 degree groove angles of 411.5 Mpa and 546.86 MPa. And the last one in micro-welding test observation with angle variation 70 degree has the biggest the percentage of ferrite structure in the weld metal and there is at 120 Ampere ampere variation of 80.0% while for percentage of pearlite structure formed at 20.0%.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Flux Core Arc Welding, Uji Tekuk (Bending Test) , Sudut Groove, Heat Input |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC1665 Offshore structures--Materials. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Alfisyahri M. Tanasha |
| Date Deposited: | 04 Jun 2026 02:38 |
| Last Modified: | 04 Jun 2026 02:38 |
| URI: | http://repository.its.ac.id/id/eprint/68317 |
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