During plastic deformation of a metal a fraction of the dislocations introduced remain stored in the microstructure. In many metals and alloys these dislocations collect into rotation boundaries, resulting in a process of microstructural subdivision during deformation. A quantitative understanding of the characteristics of deformation microstructures is important in order both to provide information about the physical mechanisms in operation during plastic deformation, and for use in the

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... ment of structure-property relationships. Some of the most important parameters of such microstructures include the dislocation boundary spacing, misorientation angle and axis, width, and inclination (boundary plane).