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All Journal Jurnal Teknologi Terapan International Journal of Industrial Innovation and Mechanical Engineering
Adri Fato
Universitas Dian Nusantara
Astronomy Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Mechanical Engineering

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ANALISIS PENGARUH VARIASI TEKANAN GAS DAN PERSENTASE KETEBALAN LAPISAN BOUNDING DAN COATING PADA PROSES REBUILD-UP MATERIAL BAJA AISI 1045 DENGAN METODE ARC SPRAY TERHADAP TINGKAT KEREKATAN ANTAR LAPISAN Fathani Adhitya Mamang; Bachtiar Bachtiar; Imam Khoirul Rohmat; Adri Fato
Jurnal Teknologi Terapan Vol 9, No 2 (2023): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v9i2.463

Abstract

Each engine component has the durability that can decrease and wear due to continuous friction. The thermal spray method is an alternative that is used. The type of thermal spray that is found in the industry is Arc Spray. However, the peeling of the coating metal with the substrate is one of the problems. In this study, the variables that have contributed to the peeling of the coating layer were taken. The variables compared are the total thickness of the bounding and coating layers of 1 mm with a percentage of 50% : 50% and 30% : 70%. Another variation is gas pressure of 2 Bar, 3 Bar and 4 Bar in rebuild-up process of AISI 1045. Specimens with thickness percentage of 30% : 70% have significant difference in tensile strength value compared to the thickness percentage of 50% : 50% with an average difference of 5.02 MPa; 4.8975 MPa and 3.29 MPa in specimens with a gas pressure of 2 bar; 3 bars; 4 bars. The influences of thickness of bound and top coat have percentage effect 21.12% on each layer. As the gas pressure increases, the bonding value is higher because the higher gas, the smaller porosity which is proved by microstructural tests.
Analysis of The Effect of Variations in Smaw Welding Current on Indications of Surface Defects Using The Penetrant Test (PT) and Magnetic Particle Test (MT) on ASTM A106 GR. B Pipes Based on Asme B31.3 Acceptance Criteria Ugih Sugiarto; Adri Fato
International Journal of Industrial Innovation and Mechanical Engineering Vol. 3 No. 3 (2026): August: International Journal of Industrial Innovation and Mechanical Engineeri
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v3i3.448

Abstract

Shielded Metal Arc Welding (SMAW) is one of the most widely used metal joining processes in the piping industry because it is capable of producing weld joints with good quality and mechanical strength. One of the welding parameters that significantly affects weld quality is the welding current. An inappropriate current setting may increase the occurrence of surface discontinuities, which can reduce the quality of the welded joint. This study aimed to analyze the effect of SMAW welding current variations on surface discontinuity indications in ASTM A106 Grade B pipe using the Penetrant Test (PT) and Magnetic Particle Test (MT) methods based on the Acceptance Criteria of ASME B31.3. The research was conducted using an experimental method on ASTM A106 Grade B pipe welded with an E7018 electrode of 3.2 mm diameter in the 1G welding position. The welding current variations applied were 46 A, 65 A, 88 A, 115 A, 160 A, and 210 A. Each specimen was initially examined through Visual Inspection, followed by Penetrant Test (PT) and Magnetic Particle Test (MT) to identify surface discontinuity indications. The inspection results were subsequently evaluated according to the Acceptance Criteria of ASME B31.3. The results showed that variations in welding current affected the surface quality of the welded joints. At welding currents of 46 A and 65 A, porosity and incomplete fill indications were still observed, while undercut indications were identified at 160 A and 210 A. In contrast, the specimens welded at 88 A and 115 A showed no discontinuity indications exceeding the acceptance limits and were therefore classified as acceptable. Based on the evaluation in accordance with the Acceptance Criteria of ASME B31.3, it can be concluded that the welding current range of 88 A to 115 A produced the best weld surface quality under the conditions of this study.
The Effect of Vibration-Assisted Welding on the GMAW Welding Process on Porosity, Microstructure, and Hardness in 5083 Aluminium Eisa Latif Nur; Adri Fato
International Journal of Industrial Innovation and Mechanical Engineering Vol. 3 No. 3 (2026): August: International Journal of Industrial Innovation and Mechanical Engineeri
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijiime.v3i3.454

Abstract

Gas Metal Arc Welding (GMAW) is widely used to join AA5083 aluminum due to its high efficiency and good weld quality. However, porosity and microstructural heterogeneity remain significant challenges that reduce the mechanical performance of the welded joint. This study explores the effects of combining vibration-assisted welding with different shielding gas flow rates on porosity, microstructure, and hardness of AA5083 aluminum welded using the GMAW method. Welding was performed at vibration frequencies of 0, 40, and 60 Hz and argon shielding gas flow rates of 15 to 20 L/min, while other welding parameters were kept constant. The welded joints were evaluated using Liquid Penetrant Testing (LPT), optical microscopy, and Vickers hardness testing. The results indicate that increasing the vibration frequency reduces surface weld damage, refines the microstructure of the weld metal, and improves hardness distribution. A higher shielding gas flow rate also enhances protection of the weld pool, thereby minimizing porosity defects and creating a more uniform microstructure. Among the various welding conditions, the combination of a 60 Hz frequency and a shielding gas flow rate of 20 L/min provided the best overall weld quality, as evidenced by the lowest porosity, the finest weld metal microstructure, and increased hardness. This study indicates that vibration-assisted GMAW combined with an appropriate shielding gas flow rate is an efficient method for improving the metallurgical quality of AA5083 welded joints.
Co-Authors Bachtiar Bachtiar Eisa Latif Nur Fathani Adhitya Mamang Imam Khoirul Rohmat Ugih Sugiarto