Transactions of the Japan Institute of Metals · 1967 · 33 citations · 9 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsMetallic MaterialsSolid State PhysicsAlloysCrystallographyMetalsOrder-disorder TransformationsPhase TransitionsX-ray DiffractionAlloy Phase DiagramsElectrical ResistivityOrder-disorder Phase DiagramPhase Diagram AnalysisPhase Transformations In Iron AlloysPowder X-ray DiffractionSpecific Heat CapacityX-ray Diffraction Analysis
Both experimental and theoretical investigations have been undertaken on the order-disorder transformation in Fe–Al alloys with less than 50 atomic percent Al. In the neighborhood of 25 percent Al these alloys are known to exhibit the two-step transformation, namely from DO3 to B2 and from B2 to disorder. The phase diagram and the Al occupation probabilities for each lattice site are coordinated by a statistical theory, and the most reasonable phase diagram for the interpretation of X-ray diffraction by powdered specimens has been obtained. This diagram is compared with the one obtained experimentally by our measurement of electrical resistivity and specific heat of the alloys. A possibility of coexistence of two phases with different types of order is also discussed.
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