physica status solidi (b) · 1970 · 39 citations · 4 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMetallic MaterialsSolid State PhysicsAlloysCrystallographyOrder-disorder TransformationsOrdering TransformationsPhase ChangePhase TransitionsCritical TemperatureCrystallographic Phase TransitionsGrain Boundary Phase TransitionsMicrostructural AlterationOrder-disorder Phase DiagramPhase Transformations In Iron AlloysStructural Phase Transitions
Abstract Transmission electron metallography has been used to resolve the microstructural changes which occur during the D0 3 ⇄L2 0 transition in an Fe26.5at%Al alloy. The micrographs show evidence for a) long‐range‐order fluctuations near the critical temperature, b) local lowering of a critical temperature in the neighborhood of domain boundaries, and c) absence of a stable two‐phase field separating the D0 3 and L2 0 phases. From these results it is concluded that the subject transition is not a classical (nucleation and growth) phase change.
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