Results 221 to 230 of about 11,887 (262)
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Welding International, 2017
AbstractIt is shown that in explosive welding in conditions preventing the formation of a cumulative jet, the cleaning and activation of the welded surfaces take place ahead of the contact point by the plasma flows. Impact plasma forms in the welding gap during the hypersonic discharge of the high-temperature impact-compressed gas at its boundary with ...
L. B. Pervukhin, O. L. Pervukhina
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AbstractIt is shown that in explosive welding in conditions preventing the formation of a cumulative jet, the cleaning and activation of the welded surfaces take place ahead of the contact point by the plasma flows. Impact plasma forms in the welding gap during the hypersonic discharge of the high-temperature impact-compressed gas at its boundary with ...
L. B. Pervukhin, O. L. Pervukhina
exaly +2 more sources
Explosive and impact welding: technical review
Materials Technology, 2007AbstractExplosive welding has proven to be an economical and technologically successful process. However, detailed understanding of the parameters involve in the process has only recently been developed and tailored through gas gun experiments. The use of welding processing domains, obtained from these gas gun studies, makes it possible to determine ...
O T Inal
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Impact of the Switching Frequency on the Welding Current of a Spot-Welding System
IEEE Transactions on Industrial Electronics, 2017This paper deals with an analysis of a middle-frequency resistance spot-welding (RSW) system with a dc welding current controlled by a pulsewidth modulated inverter, which supplies a welding transformer with a full-wave rectifier mounted at the secondary.
Robert Brezovnik +4 more
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Dynamics of space welding impact and corresponding safety welding study
Acta Astronautica, 2004This study was undertaken in order to be sure that no hazard would exist from impingement of hot molten metal particle detachments upon an astronauts space suit during any future electron beam welding exercises or experiments. The conditions under which molten metal detachments might occur in a space welding environment were analyzed.
James M, Fragomeni, Arthur C, Nunes
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Impact modeling of the weld line of tailor-welded blank
Materials & Design, 2008Finite element analyses of tailor-welded blank based on vehicle impact are performed to determine the effects of weld modeling techniques on simulation results. A novel welding model is put forward in this paper, including a simple representation of the weld geometry and material properties, which uses two-fold beams to simulate the behavior of the ...
Yuliang Shi +3 more
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The impact strength of butt welded vibration welds related to microstructure and welding history
Polymer Engineering & Science, 1989Abstract A study has been made of vibration butt welds between plaques of polypropylene. The quality of the welds, as determined by impact tests, has been examined as a function of the welding variables: pressure and vibration amplitude.
Alois K. Schlarb +1 more
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Impact of Welder Performance on the Integrity of Welds, and Enhancement of Welds Quality
MPWT 2019, 2019Absrract Piping and pipeline are considered to be 60-70% of the oil and gas industry equipment. One of the most crucial factors to complete high quality projects within planned schedules is to focus on the quality of welding activities.
Qasem A Fandem +2 more
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Welding residual stress impact on fatigue life of a welded structure
Welding in the World, 2013A welded component has been fatigue tested and then analyzed using both the nominal stress approach and the fracture mechanics approach. The nominal stress approach predicted the wrong failure location as well as a very short fatigue life. A welding simulation was then performed to understand the residual stresses generated in the structure by welding.
Lingyun Pan +8 more
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Effect of Vibratory Weld Conditioning on Weld Impact Toughness
Materials and Manufacturing Processes, 2009With vibratory weld conditioning, the enhancement of weld metal microstructure can be achieved. The mechanical properties, level of residual stresses, and deformation can also be affected. This article provides the research results of the effect on weld metal impact toughness.
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