Solute segregation and classification of [100] tilt grain boundaries in α-iron: consequences for grain boundary engineering

Autonomous Filling of Grain-Boundary Cavities during Creep Loading in Fe-Mo Alloys

“…Such a variation in the solute excess between two different grain boundaries is normal, as the enrichment of solutes at grain boundaries is highly dependent on their crystallographic character. [34,35] IV. DISCUSSION…”

Crystallographic aspects of intergranular failure of archaeological silver artefacts

“…4(d) characterised by the 126 / 011 and 112 / 237 directions are formed by the planes of the {111} type and, therefore, are special despite the value of in accordance with our model. [18] Similar deduction can be made for the other resistant non-coincidence grain boundaries being in contact with highly corroded grain boundaries (Table 1). Typical non-coincidence grain boundaries characterised by the directions parallel to the trace of the boundary at the surface relative to both adjoining grains are listed in Table 1.…”

“…A thorough study of the grain boundary segregation which resulted in classification of the grain boundaries in bcc iron revealed the existence of special grain boundaries for each asymmetrical tilt grain boundary formed by the bcc densest (110) plane on one side despite the (high) value of characterising this interface. [18] For example, the 45…”

“…[18] Analogous to the bcc structure, we may well suppose that the non-coincidence grain boundaries formed by the fcc densest plane (111) on one side at least are special. Crystallographic analysis of the locations where the corroded and untouched non-coincidence grain boundaries meet supports this idea.…”

Modelling of the microstructure and properties in the length scales varying from nano- to macroscopic

“…As ab-initio calculations are carried out under the assumption of periodic boundary conditions, so called general grain boundaries, with "random" rotation angles of the crystal lattice cannot, as yet, be modelled. Nevertheless, the currently available models do provide a useful insight into the properties of so called special grain boundaries, with specific rotations angles, which comprise a significant fraction of the grain boundaries in ultra-fine-and nano-grained aluminium alloys (see for example [20,21]). Additionally, some processes taking place at the special grain boundaries are also observed for their random counterparts, usually with different kinetics or dynamics (see for example [22]).…”