Abstract
The various structural models of short range order in alloys are briefly reviewed. The success and limitations of structural models in interpreting diffuse scattering data are discussed. Particular emphasis is given to the systems for which the diffuse short range ordered maxima in the X-ray and electron diffraction patterns are non-coincident with the position of the superlattice reflections. The recent electron diffraction results on these systems suggest microdomains with different superstructures are present in the short range ordered state. The justification for such multiple micro-domain configurations is discussed in the light of some recent theoretical developments.
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