scholarly journals Process Parameters Optimization of an Aluminium Alloy with Pulsed Gas Tungsten Arc Welding (GTAW) Using Gas Mixtures

2011 ◽  
Vol 02 (04) ◽  
pp. 251-257 ◽  
Author(s):  
Pawan Kumar ◽  
Kishor Purushottamrao Kolhe ◽  
Sashikant Janardan Morey ◽  
Chanchal Kumar Datta
Keyword(s):  
Aluminium Alloy ◽  
Process Parameters ◽  
Arc Welding ◽  
Gas Mixtures ◽  
Gas Tungsten Arc Welding ◽  
Parameters Optimization ◽  
Process Parameters Optimization ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Real-time observation of cathodic cleaning during variable-polarity gas tungsten arc welding of aluminium alloy

2009 ◽  
Vol 223 (9) ◽  
pp. 1143-1157 ◽  
Author(s):  
R Sarrafi ◽  
D Lin ◽  
R Kovacevic
Keyword(s):  
Real Time ◽  
Process Parameters ◽  
Arc Welding ◽  
Molten Pool ◽  
Gas Tungsten Arc Welding ◽  
Process Conditions ◽  
Current Electrode ◽  
Gas Tungsten Arc ◽  
Variable Polarity ◽  
Gas Tungsten

Online observation is expected to provide a better understanding of the cathodic cleaning of oxides from the molten pool during variable-polarity gas tungsten arc welding (VP GTAW) of aluminium alloys. In this paper, a machine-vision system with appropriate illumination and filtering is used to monitor in real time the effect of different process parameters on the cleaning of oxides from the molten pool during VP GTAW of Al 6061. Based on the observations, the process conditions under which a clean molten pool can be achieved are determined. In addition, the control of the welding process to maintain the consistency of cathodic cleaning is discussed. The results showed that in order to have an oxide-free molten pool, the solid surface in front of the molten pool should be cleaned from oxides by the electric arc. The choice of process parameters to satisfy this condition has been discussed. It was found that the percentage of direct current electrode positive (DCEP) polarity in the cycle of current has the highest impact on the cathodic cleaning, with the arc current having less influence, and the welding speed showing the least effect. Furthermore, in order to keep the consistency of oxide cleaning, process parameters should be set or controlled to maintain the cleaned zone larger than the molten pool.

scholarly journals Monitoring of Welding Process Parameters in Gas Tungsten Arc Welding of Carbon Steel Weldments

Mechanika ◽  
2019 ◽  
Vol 25 (1) ◽  
Author(s):  
Regita BENDIKIENE ◽  
Saulius BASKUTIS ◽  
Jolanta BASKUTIENE ◽  
Lina KAVALIAUSKIENE
Keyword(s):  
Carbon Steel ◽  
Process Parameters ◽  
Arc Welding ◽  
Welding Process ◽  
Gas Tungsten Arc Welding ◽  
Gas Tungsten Arc ◽  
Gas Tungsten
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