Title :
Material failure and inertial instabilities in a shocked and imploded cylindrical aluminum sample
Author :
Chandler, E.A. ; Egan, Patrick ; Stokes, J. ; Fulton, R.D. ; King, Naomi ; Morgan, D. ; Obst, A. ; Oona, H. ; Oro, D. ; Platts, D.
Author_Institution :
Lawrence Livermore Nat. Lab., California Univ., Livermore, CA, USA
Abstract :
Summary form only given. We have used the LANL PEGASUS Z-pinch facility to drive a thin cylindrically-convergent Al liner to /spl sim/3 km/s to launch /spl sim/30 GPa shocks in a 3-mm thick 10-mm-i.d. aluminum cylinder whose interior is filled with 1 atm Xe gas. The subsequent material motion of the metal and gas is diagnosed with both radial and axial flash X-rays and with optical framing cameras Instabilities are seeded by implanting wires of assorted higher density metal parallel to the cylinder axis. We have done two shots, varying the target from Al 1100-O to Al 6061-T6 to explore the effect of changing material strength. The images show the spallation failure of the metal-gas interface on shock release and the effect of the seeded instabilities.
Keywords :
Z pinch; aluminium; failure (mechanical); plasma instability; plasma shock waves; 1 atm; 30 GPa; Al; Al 1100-O; Al 6061-T6; LANL PEGASUS Z-pinch facility; Xe gas; axial flash X-rays; cylinder axis; inertial instabilities; instabilities; material failure; material motion; material strength; metal-gas interface; optical framing cameras; radial flash X-rays; seeded instabilities; shock launching; shock release; shocked imploded cylindrical aluminum sample; spallation failure; thin cylindrically-convergent Al liner; wire implantation; Aluminum; Electric shock; Inorganic materials; Laser theory; Optical materials; Pulse transformers; Pump lasers; Switches; X-ray imaging; X-ray lasers;
Conference_Titel :
Plasma Science, 1998. 25th Anniversary. IEEE Conference Record - Abstracts. 1998 IEEE International on
Conference_Location :
Raleigh, NC, USA
Print_ISBN :
0-7803-4792-7
DOI :
10.1109/PLASMA.1998.677830
