scholarly journals Influence of Welding Parameters and Shielding Gas Composition on GTA Weld Shape

2005 ◽  
Vol 45 (1) ◽  
pp. 66-70 ◽  
Author(s):  
Shanping LU ◽  
Hidetoshi FUJII ◽  
Kiyoshi NOGI
Keyword(s):  
Welding Parameters ◽  
Gas Composition ◽  
Shielding Gas ◽  
Weld Shape

scholarly journals The effect of metal transfer modes and shielding gas composition on the emission of ultrafine particles in MAG steel welding

2014 ◽  
Vol 19 (2) ◽  
pp. 168-176 ◽  
Author(s):  
J. F. Gomes ◽  
R. M. Miranda ◽  
P.A. Carvalho ◽  
M. L. Quintino
Keyword(s):  
Surface Area ◽  
Ultrafine Particles ◽  
Formation Rate ◽  
Welding Process ◽  
Gas Mixtures ◽  
Metal Transfer ◽  
Current Intensity ◽  
Welding Parameters ◽  
Gas Composition ◽  
Shielding Gas

The present study aims to characterize ultrafine particles emitted during gas metal arc welding of mild steel and stainless steel, using different shielding gas mixtures, and to evaluate the effect of metal transfer modes, controlled by both processing parameters and shielding gas composition, on the quantity and morphology of the ultrafine particles. It was found that the amount of emitted ultrafine particles (measured by particle number and alveolar deposited surface area) are clearly dependent from the main welding parameters, namely the current intensity and the heat input of the welding process. The emission of airborne ultrafine particles increases with the current intensity as fume formation rate does. When comparing the shielding gas mixtures, higher emissions were observed for more oxidizing mixtures, that is, with higher CO2content, which means that these mixtures originate higher concentrations of ultrafine particles (as measured by number of particles by cubic centimeter of air) and higher values of alveolar deposited surface area of particles, thus resulting in a more hazardous condition regarding welders exposure.

Influence of Shielding Gas Composition on Structure and Mechanical Properties of Wire and Arc Additive Manufactured Inconel 625

JOM ◽  
2018 ◽  
Vol 71 (2) ◽  
pp. 703-708 ◽  
Author(s):  
Ivan Jurić ◽  
Ivica Garašić ◽  
Matija Bušić ◽  
Zoran Kožuh
Keyword(s):  
Mechanical Properties ◽  
Inconel 625 ◽  
Gas Composition ◽  
Shielding Gas
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