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This document discusses the role of Frank–Read sources in the plasticity of nanocrystalline materials, particularly focusing on the limitations of thermally activated dislocation generation in these materials. It argues that the observed strain rate sensitivity of flow stress in copper cannot be explained by the thermally activated Frank–Read mechanism due to the restricted range of source lengths and stresses. The authors provide a rigorous analysis of the activation energy and stress intervals relevant to
- Author
- Daniel
- Language
- EN