The Role of Grain Boundary Energy in Texture Controlled Grain Growth

On the basic mechanism of grain growth: the role of texture on grain boundary migration rate

“…This equation establishes what is known as the special linear relationship, which holds in a generic 2-D mosaic of grain structures [23,24]. The key aspect of this relationship is that the smallest grain in the system tends to have 3 sides (Pi  0) whereas the grain of mean radius has 6 sides.…”

An EBSP study of directionally recrystallized cold-rolled nickel

“…Ignoring the energy differences of the different grain boundaries, their model predicts that cube grains with less than six grain boundaries shrink slowly, and non-cube grains with less than six boundaries shrink rapidly, while non-cube grains with more than six boundaries will grow swiftly. Initially, this leads to strengthening of the cube-texture as the small non-cube grains disappear, as has been observed experimentally in both high-purity nickel [16][17][18][19][20] and aluminum alloys [36]. The resulting microstructure has a few large noncube grains with high-mobility boundaries in a fine-grained, cube-oriented matrix.…”

“…Since the grain boundaries around these {1 2 4}<2 11>-oriented grains are high mobility boundaries, they consumed the small, primary-recrystallized cube-oriented grains. The cube grains themselves presumably grew little due to texture pinning [18], which is the basis of the Abbruzzese-Lücke statistical model of secondary recrystallization [33][34][35][36]. In their simplified model [36], only two orientations of grains are considered in the primary recrystallized microstructure, most of which have a cube orientation, while far fewer have a non-cube orientation.…”

“…During secondary recrystallization or abnormal grain growth of metals and alloys, small island grains have often been observed inside the large grains [34][35][36][37][38][39][40][41][42][43]. Low-angle or Table 2 Grain boundary misorientation angles φ (in degrees) between the abnormally grown large grains and the cube-oriented small grains in front of them twin-orientation relationships have been found between these island grains and the grains that enclose them in annealed, deformed Ag and Cu [37,38].…”

Modelling evolution of anisotropy in fabric and texture of polar ice

“…In fact, the hypothesis of a diagenetic-temperature memory influence on K cannot yet be ruled out (Petit and others, 1987). Moreover, detailed analyses of grain-boundary mobility in diverse materials have shown that the crystallographic misorientation across the boundary can have a strong influence on the grain-growth kinetics (Heckelmann and others, 1992; Humphreys and Hatherly, 1996; Doherty and others, 1997). Finally, it must be remembered that Expression (5) for the misorientation subgrain angle is a gross approximation.…”