Abstract
Austenitic stainless steel (SS304) tubes of outer diameter 19 mm, 2 mm thickness are joined together by rotary friction welding (RFW). The characterization studies are done by varying heating load, upset load, heating time, upset time and keeping constant spindle speed of 1100 rpm. The tensile and microhardness test were conducted for each fabricated joints to evaluate the mechanical properties of welded samples. The joint strength increased with increase in upset load and heating load. The maximum joint strength of 780 MPa and hardness of 210HV achieved for weld parameter of upset load 143 MPa and upset time 4sec. The detailed fracture analysis reveals the weld sample joints had experienced a ductile mode of fracture at parent metal location. The microstructure analysis revealed coarse grain structure in the weld zone compared to base metal.
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