Journal
SCRIPTA MATERIALIA
Volume 58, Issue 5, Pages 343-348Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2007.09.063
Keywords
friction stir-welding; electron backscattering diffraction (EBSD); aluminum alloys; titanium alloys; recrystallization
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The microstructural evolution around the tool during friction stir-welding of aluminum is described. The rotating tool induces a gradual rotation of the crystal lattice with a concomitant development of elongated subgrains. Additional small subgrains form within this structure by continuous dynamic recrystallization, gradually increasing in misorientation, eventually developing high-angle (>15) grain boundaries. The development of texture and similarities to friction stir welds in titanium alloys are also discussed. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
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