The effects of explosive loading on polycrystalline copper have been investigated by measuring the changes in Young's moduli and internal friction of copper specimens immediately after explosive loading and after being subjected to subsequent annealing at different temperatures. The results suggest that although the density of dislocations and other point defects in explosively loaded copper may be higher than for an annealed material, the Young's modulus and internal friction are higher and lower, respectively. The experimental results are explained in the light of Mott's defect modulus theory and the probable nature of dislocation networks in the explosively loaded copper.
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