Abstract
The energy loss per cycle of tension/compression was studied in 85/15 alpha-brass single crystals at amplitudes not exceeding the macroscopic flow stress, over the frequency range (0.015÷0.80) Hz at (80÷300) K. Its dependence on temperature, frequency and amplitude is shown to be consistent with a model in which both, the hysteretic and the frequency-dependent contribution to the loss, arise from work expended by bowing dislocations in migrating through the heterogeneous internal stress fields, which contain energy barriers with a distribution of heights. The results are similar to corresponding ones previously obtained with polycrystalline copper and alpha-brasses.
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