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Balázs Varbai, Rita Kormos, Kornél Májlinger
Pág. 68 - 73
In this paper the effects of active fluxes during gas metal arc welding (GMAW) were investigated. Eight different types of active fluxes, with different oxygen content, and MnO ? SiO2 flux mixtures were applied to the surface in 20 vol.% steps befor...
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Hongsheng Liu, Ruilei Xue, Jianping Zhou, Yang Bao and Yan Xu
Vertical oscillation arc welding for narrow gap gas metal arc welding (NG-GMAW) has a relatively simple structure, and it is widely used in all-position pipeline field welding. However, it has some shortcomings, such as incomplete fusion defects on the s...
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Bishal Silwal, Niraj Pudasaini, Sougata Roy, Anthony B. Murphy, Andrzej Nycz and Mark W. Noakes
Wire arc additive manufacturing (WAAM) is the process by which large, metallic structures are built, layer-by-layer, using a welding arc to melt wire feedstock. In this process, the proper selection of the shielding gas plays a vital role in the achievem...
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Zhuo-Yi Chen, Chuan-Xi Li, Jun He and Hao-Hui Xin
Diaphragm cutouts are set to release redundant constraints and hence reduce weld fatigue at the connection of U-ribs to diaphragms in orthotropic steel decks. However, most fatigue cracks which originate from the edge of cutouts are in fact detected in t...
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Guoqian Wei, Shanshan Li, Yongxing Guo and Zhang Dang
The real weld toe geometry is generally not mathematically perfect, resulting in obvious stress concentration effects, both on the weld section and along the longitudinal direction of the weld toe. The true stress-strain state at the local weld toe direc...
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Pavel Pereslavtsev, Christian Bachmann, Joelle Elbez-Uzan and Jin Hun Park
There is widespread use of nuclear radiation for medical imagery and treatments. Worldwide, almost 40 million treatments are performed per year. There are also applications of radiation sources in other commercial fields, e.g., for weld inspection or ste...
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Yan Dong, Guanglei Ji, Lin Fang and Xin Liu
During the service life of offshore pipelines, many start-up and shut-down cycles take place, possibly leading to significant cyclic loads. Fatigue failure may occur, resulting in serious environmental pollution and loss of property. The study aims to as...
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Totok Suwanda,Rudy Soenoko,Yudy Surya Irawan,Moch Agus Choiron
Pág. 38 - 43
In the previous study, Continuous Drive Friction Welding (CDFW) had been investigated to determine the strength of joining, burn off, and temperature distribution. In this study, Dissimilar Metal CDFW was studied to assess temperature cycle analysis. Alu...
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Yaroslav Doroshenko,Ihor Rybitskyi
Pág. 28 - 34
CFD simulation investigated turbulent flows in equal gas pipeline tees, in which the gas flow completely moves from the main line to the branch. The study was performed for tees of different geometry ? stamped with different bending radii of the transiti...
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Dries Vaes, Margot Coppens, Bart Goderis, Wim Zoetelief and Peter Van Puyvelde
Although semi-crystalline polymers are associated with considerably better mechanical properties and thermal stability compared to their amorphous counterparts, using them as feedstock for Fused Filament Fabrication still poses some major challenges. Hen...
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Md. Aleem Pasha,Dr. P. Ravinder Reddy,Dr. P. Laxminarayana,Dr. Ishtiaq Ahmad Khan
Welding of magnesium alloys influence a great effect on magnesium application expansion, especially in marine and aerospace where large-size, complex components are required. Due to specific physical properties of magnesium, its welding requires great co...
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