Microstructural and Mechanics Caracterization of Stainless Steel Weldments Applied in Vanes of Missiles

Stainless Steel welds by Gas Metal Arc Welding process in overlap has been characterized in this work, some of the current applications of the stainless steel welds are in the automotive and aeronautical industry, i.e.  the vane of the missiles such  as Patriot and other  aircraft fittings. This vane consists of an investment cast frame of stainless steel over which sheet metal of the same composition is welded.  The characterization microstructural shown the fusion line where begging the epitaxial solidification of the pool, the heat affected zone and grain refining zone present in this welding process, It is observer the ferrite microstructure typical of this stainless steel.  Microhardness test carried out in diagonal line through the weld, the heat affected zone and base metal in Vickers scale with 100 g during 15 seconds. With values from 154 HV to 204 HV the mechanical characterization donxt show great microstructural effect in the mechanical properties.