Abstract
The applicability of electron channeling contrast (ECC) in characterizing fine subgrains was investigated experimentally using warm-rolled aluminum. Subgrain sizes measured using ECC were correlated to values measured from scanning transmission electron micrographs (STEM). The influence of misorientation between subgrains and the experimental parameters of the beam current and accelerating voltage were examined analytically and experimentally. To obtain optimum resolution, the beam current was set slightlyabove the signal-to-noise threshold. The optimum accelerating voltage was found to be a function of several material characteristics including the Bragg angle and the misorientation of subgrains.
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