Influence of gas mixtures Ar-He and Ar-He-O<sub>2</sub>on weldability of aluminum alloy AA5083-O using automated GMAW-P

Nuñez, Enrique Esteban Niebles; Unfried-Silgado, Jimy; Salcedo, Jaime Elías Torres; Ramírez, Antonio J.

doi:10.1080/09507116.2015.1096514

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Shielding gas can affect the FFR in GMAW, where shielding with O 2 affects FFRs less than shielding with CO 2 , especially, with O 2 concentrations less than or equal 2% [ 47 , 50 ]. In practice, however, using O 2 of more than 2% will have a negative effect on the welded joint and so this is unlikely to be used in industrial welding processes [ 60 ]. Increasing CO 2 inside the shielding gas mixture will increase the FFR [ 27 , 57 ], that is, a shielding gas that contains 25% CO 2 can produce a FFR that is more than twice that with a 2% CO 2 in Ar-based mixture.…”

Section: Discussionmentioning

confidence: 99%

Extension of the Advanced REACH Tool (ART) to Include Welding Fume Exposure

Sailabaht

Wang

Cherrie

2018

IJERPH

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The Advanced REACH Tool (ART) is a mechanistic higher tier model to estimate inhalation exposure to chemicals using a Bayesian approach. Currently the ART model does not include exposure to welding fumes within its applicability domain; it has only been calibrated for vapours, mists, and dusts. To extend the scope to metal fumes it is necessary to review the model structure to ensure that it is appropriate, and to calibrate the updated model using available welding fume exposure measurements. This paper provides a discussion of the key modifying factors (MFs) that should be considered to extend the ART model to include welding fume exposure. Based on our literature review, welding process type, input power level, shield gas, and welding electrodes have important impact on fume formation rates (FFRs). In addition, the convective dispersion of the fume away from the weld and the interaction of the welder with the fume plume should be incorporated into the ART model. Other aspects of the ART, such as the local ventilation, do not require modification to accommodate welding fume exposure. The ART does not include the impact of wearing personal protective equipment and so this is not included in our evaluation. Proposals are made for extending the scope of the ART to include welding processes.

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