Author： Escobedo Juan P. Cerreta Ellen K. Dennis-Koller Darcie Trujillo Carl P. Bronkhorst Curt A.
Publisher： Taylor & Francis Ltd
ISSN： 1478-6443
Source： Philosophical Magazine, Vol.93, Iss.7, 2013-03, pp. : 833-846
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Abstract
The role of crystallographic orientation on damage evolution in ductile metals during shock loading has been investigated. By utilizing large-grained copper specimens, it has been shown that the development of intragranular damage, in the form of void growth and coalescence, is influenced by the grain orientation with respect to the applied load. Additionally, strain incompatibility and the inability to promote transmission or activation of secondary dislocation slip across a grain boundary, are proposed as the likely cause for intergranular failure. Finally, the free surface velocity profiles of each grain, specifically the decay of the oscillations after the pull-back, correlated well with the amount of damage measured within the respective grain.
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