Abstract
Recent experiments have shown that, during creep, subboundaries have points of very high local stress, where the “unknitting” mechanism is initiated. We discuss here the origin of these stresses. We show that they do not originate only from mesh distortions due to the interaction between subboundaries and mobile dislocations but that it is necessary to take into account the migration process. Subboundary migration thus appears to be the rate-controlling mechanism for creep.
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