Coarse-grained and fine-grained M1 copper is experimentally investigated using a new methodology for processing the results of anvil impact tests. Dynamic test data are supplemented by yield strength measurements in static tests and microstructural studies before and after impact testing. Key parameters characterizing the material response to high-speed loading are evaluated within the incubation time approach, which provides new insights into the dynamic behavior of copper with different grain structures. Comparison is made between the results of classical Taylor tests and the data derived within the new approach, which allows the yield strength to be predicted under both impulse and high-speed loading. It is shown that coarse-grained or fine-grained specimens can exhibit higher strength depending on the loading rate.
Lukashov et al. (Sun,) studied this question.