Acknowledgments
The authors would like to thank the Post-Graduate Programme in Mechanical Engineering of the UFU for the opportunity to carry out this work. Also, the CNPq for the grant for project 149308/2014-0, FAPEMIG and CAPES, for providing a research grant and study grants (doctorate). In addition, we would like to thank the Central Group for Research and Development of Welding Processes - LAPROSOLDA for supplying equipment and materials.