Statistical analysis of the arc behavior in dry hyperbaric GMA welding from 1 to 250 bar

In this paper, mathematical approaches were developed for predicting the hyperbaric GMAW process arc behavior and stability. The variation of stochastic parameters is related to the electrical stability that can be resolved into a number of varying parameters. The results show that most of the arc instability can be traced to the frequency domain of the voltage or current waveform. Uncorrelated current and voltage wave frequencies at higher pressures are found to have a great influence on process stability. (C) 2011 Elsevier B.V. All rights reserved.