Early stage dynamic damage and the role of grain boundary type
EK Cerreta, JP Escobedo, A Perez-Bergquist, DD Koller, CP Trujillo, GT Gray, C Brandl, TC Germann
SCRIPTA MATERIALIA | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2012
The role of grain boundary type in the early stages of dynamic damage evolution in copper has been investigated. Through a combination of polycrystalline and large-grained specimens, it has been shown that Σ3 and low-angle boundaries are resistant to void nucleation during shock loading to peak compressive stresses between 1.5 and 2.5 GPa. It is postulated that these boundaries promote slip transmission or secondary slip activation and thereby relieve the stress concentrations necessary for void nucleation at a boundary. © 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Awarded by NNSA of the US Department of Energy
Los Alamos National Laboratory is operated by LANS, LLC, for the NNSA of the US Department of Energy under Contract DE-AC52-06NA25396. This work was supported by the Joint DoD/DoE Munitions Technology Development Program, the Office of Basic Energy Sciences Energy Frontier Research Center for Materials at Irradiation and Mechanical Extremes (CMIME), and LDRD-DR20100026.