Abstract
Two new parameters which can numerically describe the precipitate distribution are proposed. One is for the directional alignment along [/r/V] direction and is symbolized by ‘Plhk,. The other is for the non-uniform (localized) distribution and is symbolized by A. By using the parameters, the sequence of morphological change of coherent precipitates under the influence of elastic interaction energy in Ni-base alloys are analyzed and the following conclusions are obtained: (1) as coarsening proceeds, the alignment along starts, then the localization also starts, (2) after non-uniform (localized) distribution of particles which are aligned along is attained, the particle sizes become uniform, (3) the retardation of coarsening takes place.
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