Texture Evolution within the Thermomechanically Affected Zone of an Al-Li Alloy 2195 Friction Stir Weld
作者： Wesley A. Tayon , Marcia S. Domack , Eric K. Hoffman , Stephen J. Hales
DOI: 10.1007/S11661-013-1802-Z
关键词: Welding 、 Materials science 、 Ultimate tensile strength 、 Metallurgy 、 Friction stir welding 、 Diffraction 、 Electron backscatter diffraction 、 Rigid body 、 Material flow 、 Alloy 、 Mechanics of Materials 、 Condensed matter physics 、 Metals and Alloys
摘要: Friction stir welding (FSW) of Al-Li alloy 2195 plate produces strong texture gradients. The microstructural characteristics evolve from the base plate, through thermomechanically affected zone (TMAZ), to weld nugget interface. In current study, electron backscattered diffraction (EBSD) analyses were employed quantify spatial distribution gradients associated with evolution within TMAZ. enabled be characterized as a function location. Systematic partitioning EBSD data relative degree lattice rotation at each point accurately captured crystallographic transitions across advancing side Over large section this region, evolves result continuous rigid body rotations. rotations correlated complex material flow patterns commonly FSW process and prior observations shear-related textures. Finally, correlation between fracture in subscale tensile specimen is observed, where failure occurs visible band low-Taylor factor grains.
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