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Harper-Dorn creep refers to the anomalous creep behavior first reported in 1957 by Harper and Dorn in their study on the creep behavior of large-grained aluminum. The creep rates associated with Harper-Dorn creep are two orders of magnitude faster than those predicted by Nabarro-Herring creep (diffusional creep). The present investigation provides new evidence that dynamic recrystallization occurs...