Figure 5
Diagrams showing mechanical behavior, and mechanism of grain coalescence and grain growth. (a) Vickers hardness as a function of distance from the crack showing the hardness decreases as we approach the crack. A band with dotted lines is drawn to show the increase in hardness with distance. (b) An IPF image, showing the coalescence of at least 10 grains close to a <112> orientation. (c) A color triangle showings grain orientations that are 10–19° apart from <112> orientation can be rotated into <112> with 10° tolerance by 9° rotation. (d) Schematic diagrams showing that three grains with high-angle grain boundaries become a single grain containing low-angle grain boundaries through lattice rotation and coalescence.
