Dynamic recrystallization mechanism, grain structure evolution, and mechanical behavior in friction stir welding of galvanized steel at different cooling rates
Tao Sun,
Jianhui Wu,
Zhihui Yang
et al.
Abstract:The welded joints of galvanized steel were created by friction stir welding (FSW) with different cooling rate employing a W-Re rotary tool with a large diameter needle. The microstructure evolution was studied by optical microscopy, scanning electron microscopy, and electron backscatter diffraction. The results demonstrate that the microstructural evolution mechanism of the stirring zone is discontinuous dynamic recrystallization at fast cooling rate, while the microstructure has continuous dynamic recrystalli… Show more
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