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Journal of Welding Technology
Published by Politeknik Negeri Lhokseumawe
ISSN : 27161471     EISSN : 27160475     DOI : -
Core Subject : Science, Engineering,
Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
The main scope of the journal is to publish original research articles in the area of Welding Technology The main focus of the journal is on experimental research. The scope of the journal includes;
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 70 Documents
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The effect of cooling media on impact toughness and tensile strength after GTAW welding of aluminum alloy Margi Luhur, Galih Maulana; Salahudin, Xander; Hastuti, Sri
Journal of Welding Technology Vol 7, No 1 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i1.6992

Abstract

Aluminum 5083 is extensively utilized in ship hull construction due to its high impact resistance and superior tensile load capacity, offering a lightweight alternative to steel. In maintenance procedures, welding is a fundamental method for repairing damaged sections, with Gas Tungsten Arc Welding (GTAW) favored for its precise thermal control and minimal distortion. Among the critical factors influencing weld quality, the post-weld cooling process significantly affects the resulting microstructure and mechanical performance. This study examines the effects of various cooling media—namely, Bromus Soluble Oil Cutting Coolant, Castor oil, and Mesran Super SAE 20W-50 oil—on the impact toughness and tensile strength of GTAW-welded Aluminum 5083 with a current of 325 A and 220 V AC voltage. Mechanical properties were evaluated through Charpy impact testing and tensile testing by ASTM standards. The findings reveal that Bromus coolant yielded the highest impact toughness at 0.264 J/mm², whereas Bromus coolant achieved the highest tensile strength at 12.893 Kgf/mm². These results underscore the critical role of cooling medium selection in enhancing the mechanical integrity and durability of welded aluminum structures, as the bromus coolant significantly outperformed alternatives in both impact and tensile assessments
Evaluation of magnetic particle inspection for optimizing welding quality in back gouging boom structure preparation in heavy machinery Aryswan, Adhe; Hasibuan, Apriansyah Sutan; Butar Butar, Hendra; Havwini, Tian; Gemala, Mega
Journal of Welding Technology Vol 7, No 1 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i1.5618

Abstract

This study investigates the effectiveness of Magnetic Particle Inspection (MPI) in optimizing welding preparation for the back gouging of boom structures in hydraulic mining shovels. The primary objective is to evaluate MPI's efficiency in detecting surface and near-surface defects during the pre-welding stage, thereby improving the overall welding quality of boom structures, which play a critical role in supporting heavy loads. MPI is utilized as an initial inspection method prior to Ultrasonic Testing (UT), enabling early detection of potential defects and reducing the likelihood of failures during subsequent UT evaluations. The study reveals the presence of linear and rounded discontinuities that may compromise weld integrity. By applying MPI early in the process, the need for rework during UT is minimized, resulting in cost and time savings. Furthermore, the findings of this study contribute to supporting two key organizational initiatives—People, Quality, Velocity, Cost (PQVC) and Built-in Quality (BIQ)—which aim to enhance both the efficiency and reliability of the welding process.
Identifikasi Cacat Sambungan Las SMAW Tipe Butt Joint Pada Material Baja SS400 Menggunakan Metode Liquid Penetrant Test Dan Ultrasonic Test Al Faiq, M Rauf; Hastuti, Sri; Hadi, Nur; Mulyaningsih, Nani
Journal of Welding Technology Vol 7, No 1 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i1.6930

Abstract

SMAW welding is a type of electric arc welding, where the electrode is melted by the heat generated from the electric arc between the electrode tip and the workpiece. The working principle of SMAW welding is to use heat from an electric arc to melt the base metal and the tip of the electrode coated with flux, which also functions as a filler material in the metal joining process. The purpose of this study is to determine the effect of variations in current strength and electrode type on the type of weld defects in SS400 steel material welding joints. In this study, weld defects identified from liquid penetrant testing showed six types of defects, namely crack, porosity, incomplete fusion, slag inclusion, over spatter, and undercut, while ultrasonic testing found four types of defects, namely crack, incomplete penetration, incomplete fusion, and slag inclusion. Liquid penetrant and ultrasonic testing data show that the welding process using currents of 120 A and 110 A with E7016 electrodes has the most defects, meanwhile, at a current of 100 A with E7018 electrodes, it is a welding parameter with weld results that are protected from welding defects. Based on the test data, it can be concluded that variations in current and electrode type affect the number and type of weld defects that appear, which are influenced by the welding process, the amount of current, the diameter and type of electrode, electrical polarity and penetration rate. These parameters in SMAW welding determine the efficiency and quality of metal joining results.
Heat input calculation in GTAW welding to obtain values according to pWPS Irawan, Benny Haddli; Syahidah, Bilqiz Bazilah; Gemala, Mega
Journal of Welding Technology Vol 7, No 1 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i1.5976

Abstract

This study aims to determine the ideal heat input to remain within the constraints set in the preliminary Welding Procedure Specification (pWPS). Heat input greatly influences weld quality, mechanical properties, and residual stresses, yet accurate determination during Procedure Qualification Record (PQR) trials remains challenging. This research involved field data collection during PQR testing using two coupon specimens made of ASTM B564 UNS-N06625 and ASTM B444 UNS-N06625 Grade 1 materials, each with dimensions of 11.07 mm in thickness and 60.3 mm in diameter. The Gas Tungsten Arc Welding (GTAW) process was applied in the 6G position. The acceptable heat input ranges in the pWPS are: Root (1.0–2.5 kJ/mm), Hot (1.0–2.6), Filler (0.69–1.39), and Cap (0.6–1.1). In coupon test 1, two passes failed: Pass 3 (1.51) and Pass 5 (1.43). In coupon test 2, three passes exceeded limits: Pass 4 (1.64–1.97), Pass 5 (1.42–1.72), and Pass 8 (1.19). To ensure compliance, recommended heat input parameters were formulated. For the root pass, use 97–103 A, 9–10 V, over 4 min 40 sec (2.04–2.41 kJ/mm). For the hot pass, use 98–106 A, 9–10 V, for 4 min 48 sec (1.85–2.23). The filler pass should use 79–97 A, 9–10 V, for 3 min 39 sec (1.01–1.37), and the cap pass 81–90 A, 9–10 V, for 3 min 17 sec (0.64–0.79). These parameters aim to achieve high-quality welds in line with pWPS specifications.
The effect of weld groove variations on the impact toughness and hardness of AISI 1050 steel Iqbal, Maulana; Azwinur, Azwinur; Ibrahim, Akhyar
Journal of Welding Technology Vol 7, No 1 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i1.6688

Abstract

Shielded Metal Arc Welding (SMAW) is a metal joining process that utilizes heat energy to melt both the base metal and the electrode. This study aims to evaluate the effect of weld groove variations on the impact toughness and hardness of AISI 1050 steel. Three types of groove configurations were examined: V Groove, Bevel Groove, and Double V Groove. Tests were conducted in the regions of the Weld Metal, Weld Root, Heat-Affected Zone (HAZ), and Base Metal using a welding current of 100 Amperes. The test results show that the Bevel Groove produced the highest impact toughness at the Weld Root (1.78 Joule/mm²), the V Groove at the Weld Metal (1.65 Joule/mm²), and the Double V Groove at the HAZ (1.48 Joule/mm²). In terms of hardness, the V Groove and Double V Groove showed the highest values in the HAZ (86.5 HRC), while the Bevel Groove exhibited the highest hardness in the Base Metal (81 HRC). The lowest hardness value was found in the Weld Root of the Bevel Groove (56.67 HRC). Overall, the hardness values in the Weld Metal area for all three groove types were the same, measuring 76.5 HRC
Effect of Trailing Heat Sink, Filler Type, and Current Variation on Distortion in GMAW Welding of Stainless Steel 304 KUSMINAH, IMAH LULUK; Mukhlis, Mukhlis Mukhlis
Journal of Welding Technology Vol 7, No 2 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i2.7320

Abstract

The use of welding technology in the manufacturing industry has become increasingly widespread due to its ability to enhance production effectiveness and efficiency. Stainless steel 304 is commonly used in industrial applications but is highly sensitive to weld-induced thermal expansion, making it prone to distortion. Such distortion is considered detrimental as it leads to deformation of the design, reduced dimensional accuracy, decreased mechanical strength, and increased costs for welded product repairs. To address this issue, a study was conducted using trailing heat sink-assisted welding. The Gas Metal Arc Welding (GMAW) method was applied with variations in filler electrodes (ER316LSi and ER308LSi) and welding currents (100 A and 120 A). The welding results were visually inspected and distortion was measured. The findings indicate that welding with a trailing heat sink can effectively reduce distortion, particularly at higher current levels.
Analysis of SMAW welding parameter on the mechanical properties and microstructure of the ladder on dredger vessel at Perum Jasa Tirta 1 Hudiyanto, David Muhklison; Wahyu, Mujahid; Halimi, Ahmad Dzulfikri
Journal of Welding Technology Vol 7, No 2 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i2.7385

Abstract

Komponen tangga pada kapal keruk di Perum Jasa Tirta I berperan krusial dalam menopang tekanan vertikal atau gaya hidrostatik tinggi selama operasi pengerukan, terutama pada kondisi perairan berarus kuat. Selain itu, komponen ini juga menopang komponen pemotong dan pompa hisap, sehingga pemilihan material dan desain struktur menjadi penting untuk mencegah kegagalan. Penelitian ini bertujuan untuk menganalisis struktur komponen tangga yang telah dimodifikasi berdasarkan metode pengelasan yang digunakan. Penelitian dilakukan secara eksperimental dengan memvariasikan parameter pengelasan, meliputi arus pengelasan dan kecepatan tempuh, untuk mengetahui pengaruhnya terhadap sifat mekanik dan struktur mikro. Pengelasan dilakukan menggunakan elektroda E7018 dengan arus 90 A, 100 A, dan 110 A, serta kecepatan tempuh 5 cm/menit, 7,5 cm/menit, dan 10 cm/menit. Sifat mekanik dievaluasi melalui uji tarik (mengikuti standar ASTM E8) menggunakan mesin uji dengan kapasitas beban maksimum 10 ton, dan analisis struktur mikro dilakukan dengan pengamatan metalografi di bawah mikroskop optik pada perbesaran 100x. Hasil penelitian menunjukkan bahwa peningkatan arus dan kecepatan hingga titik optimal dapat menghasilkan kekuatan tarik yang lebih tinggi, dengan hasil tertinggi sebesar 399,67 MPa dicapai dengan parameter pengelasan 110 A dan kecepatan 10 cm/menit. Lebih lanjut, peningkatan arus dan kecepatan menyebabkan perubahan mikrostruktur, menunjukkan distribusi butiran yang lebih halus dan seragam, terutama pada area HAZ dan logam las, yang berkontribusi pada peningkatan sifat mekanik. Hasil uji ANOVA menunjukkan bahwa arus pengelasan, kecepatan, dan interaksi keduanya memiliki pengaruh yang signifikan terhadap kekuatan tarik.
Comparative analysis on metallography, hardness, and corrosion rate of repair methods in welding tube SA-213 to tubesheet SA-240 Amri, Moh. Syaiful; Toto Wibowo, Alvalo; Apriliano Ananda Dzikrilla, Muh. Ofirsyah
Journal of Welding Technology Vol 7, No 2 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i2.7711

Abstract

In the fabrication process of heat exchangers, tube-to-tubesheet weld joints are often prone to defects such as porosity, cracking, undercut, and other forms of damage that can degrade the quality and performance of the equipment. To address these issues, repair becomes a crucial solution. However, due to the lack of standardized repair procedures, alternative methods such as TIG dressing and flush and reweld using filler metals of various diameters are commonly applied for the sake of time and cost efficiency. This study aims to compare three repair methods TIG dressing, flush and reweld using diameters 1.6 mm filler, and diameters 2 mm filler on macrostructure, microstructure, hardness, and corrosion rate of tube-to-tubesheet weld joints. The tests conducted include macro and micro examinations, Vickers Hardness testing, and corrosion rate. The results showed that Repair 1 (TIG dressing) produced a finer ferrite phase in the weld metal area and achieved the highest average Hardness value of 234.4 kgf/mm², although it also exhibited the highest corrosion rate at 0.44053 mm/year. In contrast, Repair 2 showed the lowest Hardness in the weld metal area, with an average of 221.9 kgf/mm², and the lowest corrosion rate of 0.28036 mm/year. Therefore, the TIG dressing method proves to be more effective in improving Hardness, but at the expense of an increased corrosion rate
Current progress on wire-arc and welding-based additive manufacturing with its potential application: a review Dioktyanto, Mudzakkir; Abdullah, Hidayat; Dewi, Yulia Puspa; Rokhim, Imam Nur; Kuswanto, Teguh Junian
Journal of Welding Technology Vol 7, No 2 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i2.8418

Abstract

Wire-Arc Additive Manufacturing (WAAM) is one of the leading metal additive manufacturing procedures for producing medium to large-scale components due to its high deposition rate, low material cost, and compatibility with common structural alloys. This paper review provides a focused and critical assessment of welding-based Additive Manufacturing (AM) technologies, particularly WAAM processes utilizing Gas Metal Arc Welding (GMAW), Gas Tungsten Arc Welding (GTAW), and Plasma Arc Welding (PAW). The scope covers the fundamental process principles, thermal–metallurgical behaviour, mechanical performance, and deposition control methods. The specific contribution of this review is: (i) explaining key process–structure–property relationships documented in recent studies, (ii) identifying core technological barriers—such as thermal distortion, porosity, residual stresses, and anisotropic microstructures—that limit industrial deployment, and (iii) outlining strategic future research directions that important for improving process stability and weld results. Key findings indicate that heat input management governs bead morphology, cooling rate, phase formation, and residual stress accumulation across multi-layer builds. Advances such as adaptive arc modes, interpass temperature control, closed-loop sensing, and hybrid subtractive–additive workflows have shown significant reductions in geometric deviation and defect formation. Nevertheless, reproducibility, dimensional accuracy, and mechanical property predictability remain persistent challenges. Overall, the review shows that integrating real-time monitoring, predictive simulation, alloy design tailored for WAAM, and intelligent control systems represents the most impactful pathway toward achieving certified and industrial-grade components.
Effect of SMAW welding current variations on mechanical properties in ASTM A240 grade 304L Nurdin, Nurdin; Al Fathier, Al Fathier; Maulana, Rizki; Fakhriza, Fakhriza
Journal of Welding Technology Vol 7, No 2 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v7i2.2509

Abstract

Welding current is one of the important parameters in the welding process, because inappropriate currents will result in welding defects in the welded material resulting in reduced weld joints. This study aims to determine the effect of current variations on SMAW welding joints ASTM A240 Grade 304L material on mechanical properties. This study uses ASTM A240 Grade 304L material with variations in welding currents of 80 A, 100 A, and 120 A using SMAW welding and using E308-16 electrodes with a diameter of 3.2 mm. Specimens were tested for chemical composition, visual test, penetrant test, and tensile test. Comparative data of tensile test explained that the highest tensile stress from variations in welding currents of 80 A, 100A, and 120 A was 625.27 MPa using a welding current of 100 A, the highest yield stress is 337.35 MPa, using a welding current of 100 A, and the highest elongation is 38.34% using a welding current of 100 A. From the data from the tensile test results for ASTM A240 Grade 304L material, the results obtained that the material data without welding treatment has the lowest tensile strength compared to with a group of variations in welding current. And the highest tensile strength value is in the 100 A current variation group.

Page 7 of 7 | Total Record : 70

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