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The aim of this research paper is to investigate the efficiency of dissimilar friction welded super duplex stainless steel SAF 2507 and mild steel joints. The joints were obtained using rotary friction welding process. Friction pressure and forging pressure are varied in three different cases but rotational speed and friction time are kept constant .The joints were subjected to tensile strength and metallographic study. The tensile strength of welded joints compared to that of SDSS SAF 2507 and mild steel in as received condition. The joint efficiency were calculated .The tensile strength and joints efficiency decreased with increasing friction pressure and forging pressure .The results attributed to change in mechanical, physical properties ,and micro structural changes of welded joints like change in ferrite to austenite percent, precipitation of carbides and nitrides ,sigma phase,....etc.

Efficiency of Dissimilar Friction Welded (Super Duplex Stainless Steel SAF 2507- Mild Steel) Joints (English)