Open AccessProgress Report for In-situ Diffraction from Hohlraum-driven Shock Waves in Solids
Author(s) -
M. S. Schneider,
Marc A. Meyers,
Bimal K. Kad
Publication year - 2003
Language(s) - English
Resource type - Reports
DOI - 10.2172/809052
Subject(s) - coalescence (physics) , materials science , nucleation , crystal twinning , diffraction , shock wave , dislocation , stacking fault energy , transmission electron microscopy , shock (circulatory) , copper , stacking fault , crystallography , composite material , optics , metallurgy , thermodynamics , chemistry , nanotechnology , microstructure , physics , medicine , astrobiology
OAK-B135 Single crystal copper and copper aluminum alloys, oriented to [001] and [134], have been the subject of a number of laser-induced shock compression experiments over the past two years. In-situ x-ray diffraction, visar wave measurements, and recovery experiments have all been performed. The effects of orientation and pressure decay on recovered samples have been characterized by transmission electron microscopy and explained by the application of physically-based constitutive equations. Dislocation densities, dislocation structures, stacking faults, and twinning have all been characterized. Our current work is focused on examining compositional differences as it relates to the stacking fault energy. Additional research has been performed on the nucleation, growth and coalescence of voids in samples shocked at the highest pressures