Disorientation Angles among Grains around Triple Junctions in Deformed and Annealed Aluminum

Abstract

Characterization of triple junctions has been performed by considering the disorientation angles among grains around triple junctions. The disorientation angles for each triple junction are called θ_min, θ_mid and θ_max, which satisfy θ_min ≤ θ_mid ≤ θ_max. Disorientation-angle diagrams that relates θ_min and Σθ_i = θ_min + θ_mid + θ_max were constructed for the triple junctions in deformed and annealed aluminum. By comparing the disorientation-angle diagrams before and after grain growth, we found self-similarity of the distribution of the disorientation angles around the triple junctions during the grain growth.