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- W2018621827 endingPage "465202" @default.
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- W2018621827 abstract "In gas metal arc welding, gases of different compositions are used to produce an arc plasma, which heats and melts the workpiece. They also protect the workpiece from the influence of the air during the welding process. This paper models gas metal arc welding (GMAW) processes using an in-house simulation code. It investigates the effects of the gas composition on the temperature distribution in the arc and on the molten pool dynamics in gas metal arc welding of steels. Pure argon, pure CO2 and different mixtures of argon and CO2 are considered in the study. The model is validated by comparing the calculated weld profiles with physical weld measurements. The numerical calculations reveal that gas composition greatly affects the arc temperature profile, heat transfer to the workpiece, and consequently the weld dimension. As the CO2 content in the shielding gas increases, a more constricted arc plasma with higher energy density is generated as a result of the increased current density in the arc centre and increased Lorentz force. The calculation also shows that the heat transferred from the arc to the workpiece increases with increasing CO2 content, resulting in a wider and deeper weld pool and decreased reinforcement height." @default.
- W2018621827 created "2016-06-24" @default.
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- W2018621827 date "2014-10-27" @default.
- W2018621827 modified "2023-09-27" @default.
- W2018621827 title "Effects of shielding gas composition on arc profile and molten pool dynamics in gas metal arc welding of steels" @default.
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- W2018621827 doi "https://doi.org/10.1088/0022-3727/47/46/465202" @default.
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