2009 Volume 50 Issue 4 Pages 832-836
To evaluate the dynamic recrystallization aspect and microstructures, electron back scattered diffraction (EBSD) analysis on friction stir welded Inconel 600 was employed. Friction stir welding (FSW) led to the dynamic recrystallization in all conditions as high angle grain boundaries were distributed more than 85% in fraction, with equiaxed grains, and the grain refinement was accelerated from average grain size of 19 μm in the base material to 3.4 μm in the stir zone by increasing the welding speed. Also, it increased microhardness by more than 20%, compared to base material microhardness, and the effect of grain size on the microhardness in the stir zones was satisfied with Hall-Petch relationship.
