Five-Parameter Grain Boundary Character Distribution in Fe-1%Si

Abstract

The grain boundary character distribution in an Fe-1%Si steel has been measured as a function of lattice misorientation and boundary plane orientation. There is a weak texture in the space of grain boundary planes that favors the {110} orientation. At specific misorientations, the anisotropy is larger. For example, when the lattice misorientation is 60° around [111], symmetric tilt boundaries comprised of two {110} planes on either side of the interface dominate the population. The results are consistent with observations suggesting that in a range of crystalline materials, the low energy, low index surface planes are found to dominate the distribution of internal interfaces.

The Distribution of Grain Boundary Planes in Interstitial Free Steel

“…[22] Mee's result is consistent with the current observation as there is a pronounced (111)//ND texture due to the static recrystallization and the (111) plane showed a maxima (i.e., most likely due to the minimum surface energy, Figure 5). The difference in the current grain boundary plane distribution with the previous study on Fe-1 pct Si [13] could, therefore, arise from the differences in the thermomechanical processing or the composition of the alloy.…”

“…In addition, very little anisotropy was observed in the distribution of grain boundary planes (i.e., about 10 pct higher than expected for a random distribution). [13] The evolution of microstructure is known to strongly depend on the anisotropy of grain boundary energy. It is known that there is a strong inverse correlation between the grain boundary energy and its population (i.e., the high energy planes have the minimum population and vice versa).…”

“…The only five-parameter analysis on body-centred cubic crystal structure was a very limited study of the grain boundary distribution of a Fe-1 pct Si alloy. [13] In view of the continuing interest in the distribution of grain boundary planes, and our limited knowledge of this distribution in technologically important ferritic steels, the objective of the present paper is to provide a detailed description of the grain boundary character distribution in a commercial IF steel using the five-parameter grain boundary analysis technique. The experimental observations are compared with calculated grain boundary energies [14] to examine whether the relationship between the boundary plane distribution and energy reported for other materials is maintained in a body-centered cubic metal (i.e., IF steel).…”

Mechanism for the development of anisotropic grain boundary character distributions during normal grain growth

“…Similarly, when microstructures are evolving under the influence of stored plastic energy (for example, during recrystallization or grain boundary engineering processes) it is not obvious that grain boundary energy would be the deciding factor in determining which boundaries are shrinking or growing. However, microstructures that evolve in this way do lead to anisotropic GBCDs that appear to emphasize lowenergy grain boundaries [1,2,52,53]. Developing a complete understanding of how the grain boundary character evolves will enable new strategies for tailoring materials properties.…”

Grain boundary plane reorientation: model experiments on bi- and tricrystals

“…The importance of the two remaining DOF describing the grain boundary plane orientation has been shown in many papers, e.g. [5][6][7][8][9][10][11][12][13][14][15][16]. The difference between the CSL criterion and the grain boundary classification based on all five DOF in terms of GBE can be illustrated in Fig.…”