Visual inspection on shielded metal arc welding products of Asian welding contestants in Yogyakarta province

Djatmiko, Riswan Dwi; Kurniawan, D. A.; Pratiwi, Henny

doi:10.1088/1742-6596/1446/1/012006

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…All welding imperfections not included in groups 1 to 5 are miscellaneous. They relate to the surface condition, external shape or geometry of the joint and are detected by visual tests and simple measurements [19][20][21][22][23]. In this group the standard includes, among others, grinding marks, spatter and arc strike.…”

Section: Introductionmentioning

confidence: 99%

Effect of Arc Strikes on High Strength Low Alloy Steels Welded by SMAW

Fydrych,

Raczko,

Świerczyńska

et al. 2023

Adv. Sci. Technol. Res. J.

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Wet welding with covered electrodes (Shielded Metal Arc Welding -SMAW) is the most commonly used method of carrying out welding repair works in a water environment. Limited visibility and the inability to move freely under water result in an increased risk of formation of welding imperfections such as lack of fusion, lack of penetration and arc strikes. The work focused on changes in the properties and structure of steel subjected to the impact of short (0.2 s) arc ignitions generated by covered electrodes in air and under water for three high strength steel grades: S460N, S460M and S500MC. Visual tests, macroscopic and microscopic metallographic tests, microhardness measurements and diffusible hydrogen content in deposited metal determination were performed. A significant influence of the environment on changes in the morphology and microhardness of steel in the vicinity of arc strikes was found. The microhardness of the areas covered by the rapid thermal cycle caused by SMAW increased from 200-230 HV0.5 to 400-500 HV0.5 depending on the steel grade. The presence of welding imperfections: cavities and cracks were detected. The susceptibility of all steel grades subjected to short thermal cycles to cracking was confirmed by the results of measurements of the diffusible hydrogen content: 38.6 ml/100 g and 84.5 ml/100 g for air and water environment, respectively. No influence of changes in the welding current on the behavior of the material in the tested conditions was found. The conducted research shows that leaving arc strikes on the structure may have serious consequences and cause a failure.

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Section: Introductionmentioning

confidence: 99%

Effect of Arc Strikes on High Strength Low Alloy Steels Welded by SMAW

Fydrych,

Raczko,

Świerczyńska

et al. 2023

Adv. Sci. Technol. Res. J.

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Penetrant test on student welding practice results based on AWS and ASME standards

Ardian¹,

Ghozi²,

Hargiyarto³

et al. 2023

Vii International Conference “Safety Problems of Civil Engineering Critical Infrastructures” (Spceci2021)

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Analysis of quality student practice results in shielded metal arc welding

Hargiyarto

Syauqi

Sugiyono

et al. 2020

J. Phys.: Conf. Ser.

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This study aims to describe and determine the breakdown level of the V Groove welding results of students in Shielded Metal Arc Welding practice in the 3G (Vertical Up) position based on the American Welding Society standards. This study uses a quantitative descriptive research approach to describe the quality of the welding results. The collecting data in this study uses a visual assessment checklist based on AWS standards. The research conduct in a fabrication workshop at, Department of Mechanical Engineering Education, Faculty of Engineering, Yogyakarta State University. The data analysis technique was done by visually assessing students’ welding results and averaging them then describing them. The number of samples from this study were all training participants totaling 18 students. The results of this study indicate that: overall, the pass rate of students in welding the V groove connection in the 3G position SMAW practice is still meager, from a total of 18 students, none of them passed. Most students did not pass welding in the irregular bead, free from arc stray and spatter, undercut material, weld profile, and crater cross-section. The cause of student failures is due to a lack of understanding of how to avoid welding defects.

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Visual inspection on shielded metal arc welding products of Asian welding contestants in Yogyakarta province

Cited by 4 publications

References 9 publications

Effect of Arc Strikes on High Strength Low Alloy Steels Welded by SMAW

Effect of Arc Strikes on High Strength Low Alloy Steels Welded by SMAW

Penetrant test on student welding practice results based on AWS and ASME standards

Analysis of quality student practice results in shielded metal arc welding

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