Some observations relating to recovery of internal friction during fatigue of aluminum

S. R. Valluri
naca-tn-4371
Sep 1958


Recovery of internal friction during periods of rest in specimens subjected to fatigue stresses in torsion has been studied experimentally with high-purity aluminum. The effective heat of activation for the process is found to be about 10,000 calories per gram molecule or less. The idea is presented that the dislocations responsible for the recovery of internal friction are the same as those responsible for fine slip which according to one existing theory, is the mechanism responsible for fatigue failure.

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