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Gas metal arc welding

About: Gas metal arc welding is a research topic. Over the lifetime, 11706 publications have been published within this topic receiving 109555 citations. The topic is also known as: metal active gas welding & GMAW.


Papers
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Journal ArticleDOI
TL;DR: In this article, the transfer of energy between the plasma and the iron anode and the evaporation of metal were taken into account in modeling a short free-burning arc in argon at atmospheric pressure.
Abstract: The transfer of energy between the plasma and the iron anode and the evaporation of metal were taken into account in modeling a short free‐burning arc in argon at atmospheric pressure. The presence of metal vapor in the plasma modifies the electrical conductivity and the radiated power and leads to arc cooling in the anode region. In return, the arc cooling modifies the rate of vaporization of the anode and thus the calculated concentration of iron vapor in the arc.

79 citations

Journal ArticleDOI
TL;DR: In this article, a high power laser-metal inert gas (MIG) hybrid welding of AZ31 Mg alloys was studied, where the arc was compressed and stabilized by the laser beam during the hybrid welding.

79 citations

Journal Article
TL;DR: In this article, the effects of base metal and welding electrode composition on welding fume were evaluated in a shipyard environment and the results indicated that exposure to hexavalent chromium can be expected when welding or cutting materials that contain chromium or chromates.
Abstract: Tests were conducted to determine the effects of base metal and welding electrode composition on welding fume. Materials included HY-100 and HSLA-100 high-strength, low-alloy steels. Shielded metal arc welding (SMAW) was performed with E1 1018-M electrodes and gas metal arc welding (GMAW) with MIL-100S-1 electrode wire. These tests included measurement of fume composition, fume generation rates and worker breathing zone fume. Sampling of welding fume also was conducted in a shipyard. This study concludes that some shipyard welding and cutting operations, materials and processes will be impacted by the recent and anticipated reductions in exposure limits. Additional controls will be required to comply with these reductions. Results indicate: . Exposure to hexavalent chromium can be expected when welding or cutting materials that contain chromium or chromates. These materials include stainless steels, high-chromium nickel alloys and some low-alloy steels. . The highest nickel levels occurred during SMAW and GMAW of stainless steels and nickel alloys. However, only the samples in enclosed spaces exceeded the proposed limit for nickel. . SMAW, GMAW and flux cored arc welding (FCAW) of stainless steels, carbon steels and low-alloy steels produced the highest manganese levels. . Eight-hour TWA levels of hexavalent chromium of up to 1-2 μg/m 3 were found during shipyard and laboratory sampling of SMAW of HY-100 using E11018-M and E12018-M electrodes. Similar levels also may be possible when welding with these electrodes on other materials.

79 citations

Journal ArticleDOI
TL;DR: In this paper, a new chamber for laser welding under low vacuum conditions achieved by using rotary pumps was developed, and high-power disk laser bead-on-plate welding was performed on Type 304 stainless steel or A5052 aluminium alloy plate at the powers of 10, 16 and 26 kW at various welding speeds under low-vacuum conditions.

79 citations

Journal ArticleDOI
TL;DR: In this article, the influence of shielding gas composition on arc properties including temperature, voltage, heat flux and shear stress at the anode and also the weld depth as indicated by the maximum temperature of a water cooled anode is investigated.
Abstract: The influence of shielding gas composition on arc properties including temperature, voltage, heat flux and shear stress at the anode and also the weld depth as indicated by the maximum temperature of a water cooled anode is investigated. It is found that the additions of helium, hydrogen and nitrogen to argon all increase the arc and anode temperature. For helium, this is due to the lower electrical conductivity; in the other cases, it is due to the higher specific heat.

78 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023195
2022351
2021292
2020385
2019330
2018346