Abstract
A brief review is presented of strain rate history and temperature history effects during the high strain rate deformation of metals with special emphasis on the BCC metals. Possible explanations to account for history effects are reviewed. Experiments are described in which single crystals of aluminum are deformed at various strain rates. Observations by transmission electron microscopy are used to relate microscopic to macroscopic behavior. Results show that cell size influences the strain rate sensitivity and may be a cause of history effects.
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