Notice of RetractionFrictional stir welding on aluminum alloys AA2024-T4 and AA7075-T6

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

The respiratory effects often seen in full time welders include bronchitis, Airway irrigation, lung function changes, lung fibrosis and a possible increase in the incidence of lung cancer. Functionally significant pulmonary fibrosis associated with exposure to silica dust, nitrogen dioxide gas and other components of the welding fume would appear to leads to severe form of fibrosis in welders. Traditionally, control of fumes and gases has been by enclosure and local exhaust ventilation, respiratory protective equipment may also be necessary in certain circumstances, in particular in confined spaces.. In this context, an environmentally cleaner process has been invented at The Welding Institute (TWI), UK, which is popularly known as Friction Stir welding (FSW) process. This comparatively recent innovation has permitted friction technology to be used to produce continuous welded seams for plate fabrication. Compared to many of the fusion welding processes that are routinely used for joining structural alloys. FSW is an environmentally cleaner welding process, due to the absence of a need for the various gases that normally accompany fusion welding. FSW process produces no smoke, fumes, arc glare and it is an eco friendly process. This paper deals with the improvement in micro hardness and mechanical properties shown by aluminum alloys after friction stir welding.