Progress Report for In-situ Diffraction from Hohlraum-driven Shock Waves in Solids

Schneider, Matthew S. ; Meyers, Marc A. ; Kad, Bimal

University of California, San Diego

关键词: Aluminium;    Alloys;    Stacking Faults;    Laser, Copper, Shock Compression, Transmission Electron Micrscopy, X-Ray Diffraction, Dislocations, Twinning;    70 Plasma Physics And Fusion Technology;   

DOI  :  10.2172/809052
RP-ID  :  DOEProgress/DP00212
RP-ID  :  FG03-98DP00212
RP-ID  :  809052

美国|英语

来源: UNT Digital Library

【 摘 要 】

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.