T. Vystavel et al., High-resolution and conventional electron microscopy study of a Sigma=3, [101]{121} twin grain boundary in molybdenum, PHIL MAG A, 81(2), 2001, pp. 417-429
Complete structural analysis of a Mo bicrystal containing a Sigma =3, [101]
(1 (2) over bar1)(A) grain boundary (GB) was achieved by means of transmiss
ion electron microscopy from the microscopic to the nanoscopic level. Secon
dary GB dislocations compensating a small deviation from the exact Sigma =3
concidence were observed and their character was determined. Rigid-body di
splacements (RBDs) were determined directly from high-resolution electron m
icroscopy images using samples with surface normal parallel and perpendicul
ar to the tilt axis. Measured values of RBDs are compared with recent theor
etical calculations.