Figure 2: Crystallographic orientation relationships (OR’s) between ferrite (α) and austenite (γ).
From: Preferential Nucleation during Polymorphic Transformations
(A) Schematic illustration of the special Kurdjumov-Sachs (K-S) OR. The spheres indicate the positions of the atoms. The parallel plane condition {110}α//{111}γ is illustrated with the red planes and the parallel direction condition 〈111〉α//〈110〉γ is illustrated with the green arrows. Polar histogram of the number of the observed OR’s as a function of the deviation angle from the parallel (B) plane and (C) direction conditions. The horizontal axis (0°) in (B) represents the parallel plane condition {110}α//{111}γ for both the K-S and Nishiyama-Wasserman (N-W) OR’s. The horizontal axis (0°) in (C) represents the parallel direction condition for the ideal K-S OR: 〈111〉α//〈110〉γ.
