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Science et ingénierie des matériaux et des procédés

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A Frank Read source sends dislocations through a random set of cubic unshearable precipitates. They are by-passed according to the Orowan's model.
    One can notice loop pile-up around each precipitates crossing the glide plane containing the source. The shape of the Orowan loops is either triangular or hexagonal corresponding to the intersection between a (100) cube and a (111) plane.  
    When many loops are present, passages between precipitates are narrower. Consequently the passage of dislocations is more difficult and the rythm of the source is slowed down.

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mise à jour le 23 mars 2009

Université Grenoble Alpes