**Acknowledgements**

To Federal University of Pará, Postgraduate Program in Natural Resources Engineering in the Amazon (PRODERNA/UFPA) and to the Metallic Materials Characterization Laboratory (LCAM) for all support in carrying out the tests and coworker who ceded their scientific work.

*A Brief Study of Unconventional Variants of GMAW Welding: Parameters, Weld Bead… DOI: http://dx.doi.org/10.5772/intechopen.104525*
