Quasi-In-Situ EBSD Observation of the Orientation Evolution in Polycrystalline Tantalum During Rolling Deformation

摘要

The evolution of crystallographic orientation of polycrystalline tantalum(Ta)during rolling was characterized by electron backscatter diffraction technique in a quasi-in-situ way,and the microstructure and microtexture before and after the deformation were characterized and analyzed,respectively.In the specimen,164 individual grains were exacted singly from the testing region and their corresponding orientations were reconstructed and analyzed,respectively.Results show that the heterogeneous deformation in a grain can be reflected by the accidented surface microstructure.Moreover,the orientations close to{111}orientations came closer to the{111}corner,while the orientation evolution is more complicated for the orientations close{100}corner,indicating that the evolution of these orientations close to{100}corner seemed to be irregular.