Nanoscale Plasticity at Grain Boundaries in Face-centered Cubic Copper Under Shock Loading
SJ Fensin, C Brandl, EK Cerreta, GT Gray, TC Germann, SM Valone
JOM | SPRINGER | Published : 2013
We investigate the responses of four representative grain boundaries in face-centered cubic Cu bicrystals to shock compression as a function of the loading direction. Two loading directions are considered, either parallel or perpendicular to the grain boundary plane, representing the extremes that a polycrystalline sample will ordinarily experience under the uniaxial strain conditions of planar shock loading. Using molecular dynamics simulations, we demonstrate that the deformation processes during shock compression of the same boundary are altered measurably by changing the loading direction. The Majority of the differences in the nanoscale deformation processes were related to the activati..View full abstract
Awarded by U.S Department of Energy
Awarded by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
Los Alamos National Laboratory is operated by LANS, LLC, for the NNSA and the U.S Department of Energy under contract DE-AC52-06NA25396. This work was supported by the Center for Materials at Irradiation and Mechanical Extremes, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under award number 2008LANL1026. The work of S.J.F. and E. K. C. was also supported by the DOD/DOE Joint Munitions Program. The authors would also like to thank Jian Wang for helpful discussions.