TITLE

Isentropic compression of iron with the Z Accelerator

AUTHOR(S)
Asay, J. R.; Hall, C. A.; Holland, K. G.; Bernard, M. A.; Stygar, W. A.; Spielman, R. B.; Rosenthal, S. E.; McDaniel, D. H.; Hayes, D. B.
PUB. DATE
April 2000
SOURCE
AIP Conference Proceedings;2000, Vol. 505 Issue 1, p1151
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Development of isentropic loading techniques is a long standing goal of the shock physics community. We have used the Sandia Z Accelerator to produce smoothly increasing pressure loading on planar iron specimens over time durations of 100 ns and for pressures to 300 kbar. Free surface velocity measurements were made on specimens 0.5-mm and 0.8-mm thick that clearly show wave evolution into the well known two-wave structure resulting from the α-ε phase transition. The resulting wave profiles are analyzed with a rate-dependent phase transition model to extract information on phase transformation kinetics for isentropic compression of iron. Comparison of the experiments and calculations demonstrate the value of isentropic loading for studying phase transition kinetics.
ACCESSION #
5985610

 

Related Articles

  • The development of the VISAR, and its use in shock compression science. Barker, Lynn M. // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p11 

    VISAR predecessors are described, including the displacement and velocity interferometer techniques for shock instrumentation. The advance to the VISAR in 1972 made laser interferometry applicable to a very wide range of shockwave experiments. With a 1974 refinement of the VISAR data reduction...

  • Metastability in shocked iron: Controversy with regard to sound velocity and temperature measurements. Boness, David A. // AIP Conference Proceedings;2000, Vol. 505 Issue 1, p77 

    A discrepancy still exists between key shock temperature measurements and corresponding results from laser-heated diamond anvil cells for iron. Shock melting temperatures for iron deduced from anvil interface temperature measurements exceed the melting curve from static experiments. Also,...

  • Electrical Conductivity Investigation of Graphite-Diamond Transition under Multiple Shock-Wave Compression. Postnov, Victor I.; Fortov, Vladimir E.; Yakushev, Vladimir V.; Yakusheva, Tatjana I. // AIP Conference Proceedings;2002, Vol. 620 Issue 1, p233 

    The transition of high oriented pyrolytic graphite (PH) and unoriented high density (UH) graphite was investigated under multiple shock-wave compression up to 60 GPa. It was found (for PH graphite) when the amplitude of first shock wave exceeds the pressure of graphite — diamond phase...

  • The Shear Strength of Potassium Chloride above the B1-B2 Phase Transition during Shock Loading. Millett, J. C. F.; Bourne, N. K. // AIP Conference Proceedings;2002, Vol. 620 Issue 1, p213 

    Previous work on the shock-induced phase transformation of potassium chloride has been unable to assess the deviatoric (shear) stresses in either the mixed phase (B1 and B2) region or the high pressure phase (B2). This work has attempted to balance this deficiency through the measurement of...

  • On the Mechanism of Laser-Induced Graphite Conversion into Pyrocarbon in a Subsurface Layer of Cast Iron. Kozlov, G. I. // Technical Physics Letters;Sep2001, Vol. 27 Issue 9, p737 

    Based on the original experimental results and on the analysis of published data, the author suggests a consistent variant of the possible mechanism of carbon phase transitions in a subsurface layer of cast iron subjected to a special laser treatment. The phase transitions involve the formation...

  • Aluminum oxynitride at pressures up to 180 GPa. Sekine, Toshimori; Xijun Li, Toshimori; Kobayashi, Takamichi; Yamashita, Yasuyuki; Patel, Parimal; McCauley, James W. // Journal of Applied Physics;10/15/2003, Vol. 94 Issue 8, p4803 

    Hugoniot equation-of-state data of shock compressed aluminum oxynitride (AlON), consisting of 64.1 mol% Al[sub 2]O[sub 3]·35.9 mol% AlN with a density of ∼3.68 g/cm[sup 3], have been determined to 180 GPa. The relationship between shock velocity (U[sub s]) and particle velocity (U[sub...

  • Response to Unloading and Reloading of Shock Compressed Polymethyl Methacrylate. Reinhart, W. D.; Chhabildas, L. C. // AIP Conference Proceedings;2006, Vol. 845 Issue 1, p131 

    Shock properties of polymeric materials have been investigated at low stresses for use as windows for velocity interferometry, binder phases for polymer-bonded explosives, and as adhesives. The shock Hugoniot for many other polymeric materials may also exist. There are distinct advantages in...

  • Liquid-Solid Phase Transition of Benzene under Shock Compression Stuided by Time-Resolved Nonlinear Raman Spectroscopy. Nakamura, K. G.; Matsuda, A.; Kondo, K. // AIP Conference Proceedings;2006, Vol. 845 Issue 1, p1341 

    The liquid-solid phase transition of benzene has been studied under laser-shock compression up to 4.2 GPa by using nanosecond time-resolved nonlinear Raman spectroscopy. A shock wave is generated by irradiation of 10-ns pulsed laser beam on the plasma confinement target and its pressure is...

  • The Influence of Peak Stress on the Mechanical Behavior and the Substructural Evolution in Shock-Prestrained Zirconium. Cerreta, E.; Gray III, G. T.; Henrie, B. L.; Brown, D. W.; Hixson, R. S.; Rigg, P. A. // AIP Conference Proceedings;2004, Vol. 706 Issue 1, p541 

    The post shock mechanical behavior and substructure evolution of zirconium (Zr) under shock prestrained at 5.8 and 8 GPa, above and below the pressure induced α-ω phase transition, has been quantified. The reload yield stress of Zr shock prestrained to 8 GPa was found to exhibit enhanced...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics