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All Journal Rekayasa Mesin Rekayasa Sipil Turbo : Jurnal Program Studi Teknik Mesin Indonesian Physical Review DIKEMAS (Jurnal Pengabdian Kepada Masyarakat) Specta Journal of Technology PIKAT
Jatmoko Awali
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Environmental Science Mechanical Engineering Physics Social Sciences Other

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Journal : Specta Journal of Technology

 1 
Analysis of Welding Current Variation of SMAW and GTAW Combination Welding with Double V Groove on The Mechanical Properties and Microstructure of SS304 Stainless Steel amalia, lia; Sinambela, Maria Lena; Tanjung, Rifqi Aulia; Awali, Jatmoko
SPECTA Journal of Technology Vol. 7 No. 1 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (448.141 KB) | DOI: 10.35718/specta.v7i1.663

Abstract

In this paper, the combination of shielded metal arc welding (SMAW) and gas tungsten arc welding (GTAW) welding methods are used in a double V groove SS304 10 mm thick plate. Welding current variation of 110A SMAW/120A GTAW, 100A SMAW/130A GTAW, and 90A SMAW/140A GTAW was used to observe the effect of the welding current variation on the tensile strength and microstructure. Tensile test and metallography test were performed to observe the phenomenon. ImageJ software was used for microstructure analysis. The welding current variation resulted in higher tensile strength with the highest current on GTAW method, while a more dispersed and lathy ferrite structure was observed on the microstructure.
Analisis Pengaruh Variasi Arus Pengelasan Kombinasi SMAW dan FCAW Double V Groove terhadap Kekuatan Tarik, Impact dan Struktur Mikro Daerah Weld Metal Baja ASTM A36 Akbar, Rizky; Awali, Jatmoko; Stasiyanur, Flora; Lubis, Muthia Putri Darsini
SPECTA Journal of Technology Vol. 7 No. 1 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (827.51 KB) | DOI: 10.35718/specta.v7i1.704

Abstract

This research uses shielded metal arc welding (SMAW) welding method combined with flux core art welding (FCAW) welding method using ASTM A36 10 mm steel material and using double V seam. Then the electrode used in this study is for SMAW E7018 welding. , while for FCAW E71T1 welding. The current variations used are SMAW 60A, 75A, 90A and FCAW 190A, 205A, 220A. The purpose of this research is to determine the optimal current that produces the highest tensile and impact strength and differences in microstructure in the weld metal area. From the results of this study, the highest tensile and impact strengths were at 90A SMAW and 220A FCAW with a tensile strength of 526.96 N/mm and an impact strength of 1.2044 J/mm2. Then the microstructure formed is Grain Boundry Ferrite (GBF), Pearlite (P), Arcicular Ferrite (AF), Ferrite (F). Where the percentage of SMAW weld metal is 72.1% Ferrite and 27.9% Pearlite, while in FCAW weld metal it is 75.63% Ferrite and 24.37% Pearlite.
Penambahan Ekstrak Ranting Karamunting (Rhodomyrtus Temenosa) Sebagai Inhibitor Alami Pada Baja AISI 1040 Yanti, Lisda; Darma, Daffa Irsyad; Rifani, Muhammad; Tajalla, Gusti Umindya Nur; Awali, Jatmoko; Mohd, Yusairie; Triana, Yunita
SPECTA Journal of Technology Vol. 7 No. 2 (2023): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v7i2.925

Abstract

  In this study, Karamunting twig extract (Rhodomystus tementosa) was used as a natural inhibitor on AISI 1040 steel. Based on the results of functional group analysis, it was confirmed that the compounds found in Karamunting twig extract are tannins and flavonoids. Electrochemical analysis using the potentiodynamic method showed the lowest corrosion rate at 300 ppm inhibitor concentration, with a corrosion rate of 2.881 mm/yr with an inhibition efficiency of 76.732%. Furthermore, the EIS test showed the highest inhibition efficiency at a concentration of 300 ppm, with a value of 66.720%.
Co-Authors Ahmad Syaifuddin Akbar, Rizky Al Habib, Irsyad Asroni Asroni Basyaruddin Basyaruddin, Basyaruddin Darma, Daffa Irsyad Destiny, Keysi Devain Dewanto, Hizkia Alpha Hizam, Fadli Indrawati, Dini Ismail , Andi Idhil Ismail, Ika Laksono, Andromeda Dwi Leoriza, Meutya Dwi LIA AMALIA Maulana, M. Arzil Moch. Agus Choiron Mohd, Yusairie Muhammad Rifani, Muhammad Murni Handayani Muthia Putri Darsini Lubis Nabila, Najwa Pratama, Winardi Dian Wahyu Putra, Ade Wahyu Yusariarta Rohimsyah, Fikan Mubarok Rudiyanto, Fahmi Sinambela, Maria Lena Stasiyanur, Flora Suryaningsih, Alnovia - Tajalla, Gusti Umindya Nur Tanjung, Rifqi Aulia Thesalonicha, Somalinggi Yanti, Lisda Yudy Surya Irawan Yunita Triana, Yunita