Institut für Metallkunde und Metallphysik, RWTH Aachen, 52056 Aachen, Germany Carnegie Mellon University, Pittsburgh PA 15213, USA Abstract The migration of planar, symmetric tilt grain boundaries with different tilt axes was investigated. The driving force for the grain boundary migration was due to an external mechanical stress field. Low as well as high angle grain boundaries can move under ...

The dynamic spheroidization mechanism and its orientation dependence in Ti-6Al-2Mo-2V-1Fe alloys during subtransus hot deformation were studied this work. For purpose, compression tests carried out at temperatures of 780–880 °C, with strain rates 0.001–0.1 s−1. Based on SEM, EBSD TEM characterization, the results showed that aspect ratio α phase decreased increasing decreasing rates. At 880 °C/...

Grain boundary structure and current–voltage (I –V ) characteristics were investigated for Nb-doped SrTiO3 bicrystals having small angle tilt boundaries with misorientation angles of 2◦ and 4◦ against [001]. The bicrystals were fabricated by using hot-joining technique at 1400◦C for 10 h under a pressure of 0.4 MPa. High resolution transmission electron microscopy study revealed that the joined...