Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-28T06:22:34.423Z Has data issue: false hasContentIssue false
  • English
  • Français

Tape Casting Technique for Fabrication of Graded-Density Impactors for Tailored Dynamic Compression

Published online by Cambridge University Press:  26 February 2011

L. Peter Martin ,
Jeffrey H. Nguyen ,
Jeremy R. Patterson ,
Daniel Orlikowski ,
Palakkal P. Asoka-Kumar  and
Neil C. Holmes
L. Peter Martin
Affiliation:
[email protected], Lawrence Livermore National Lab., Engineering Technologies Division, P.O. Box 808, L - 353, Livermore, CA, 94551, United States, 925-423-9831
Jeffrey H. Nguyen
Affiliation:
[email protected], Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, United States
Jeremy R. Patterson
Affiliation:
[email protected], Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, United States
Daniel Orlikowski
Affiliation:
[email protected], Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, United States
Palakkal P. Asoka-Kumar
Affiliation:
[email protected], Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, United States
Neil C. Holmes
Affiliation:
[email protected], Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, CA, 94551, United States
Get access

Abstract

Recently, the use of graded density impactors for dynamic compression experiments has received increasing interest. These gas gun experiments have demonstrated complex loading paths which can last microseconds, and may be capable of bridging the timescales of existing static and dynamic compression experiments.A tape casting technique has been developed for fabrication of the impactors. In the technique, a series of tapes were prepared in the Mg-Cu system with compositions ranging from 100% Mg to 100% Cu. The tapes were characterized for their layer thickness, density, and sound wave velocity. Impactors were fabricated by punching individual layers from the tapes, stacking and laminating them, removing the organic matrix, and hot-pressing the laminated structure. The density profile is determined by the order in which the tapes are stacked in the laminate and is therefore highly flexible. The resultant thickness and average density of the impactors is consistent with the data for the individual layers. Impactors were characterized for uniformity by ultrasonic C-scan and white light interferometry. Dynamic compression experiments were performed on a two-stage helium gas gun using the graded density impactors. Results will be presented and shown to agree well with hydrocode modeling.

Keywords

compositehot pressingpowder metallurgy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 987: Symposium PP – Materials Research at High Pressure , 2006 , 0987-PP01-09
Copyright
Copyright © Materials Research Society 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Mitchell, A.C. and Nellis, W.J., J. App. Phys. 52, 3363 (1981).Google Scholar
2. Nguyen, J.H., Orlikowski, D., Streitz, F.H., Moriarty, J.A., and Holmes, N.C., J. Appl. Phys. 100, 023508 (2006).Google Scholar
3. Nguyen, J.H., Orlikowski, D., Streitz, F.H., Moriarty, J.A., Holmes, N.C., AIP Conf. Proc. 706, pt. 2, 1225 (2004).Google Scholar
4. Barker, L.M., Shock Waves Cond. Matt., Assay, J.R., Graham, R.A., and Straub, G.K., eds. (Elsevier, Amsterdam, 1984).Google Scholar
5. Xiong, H., Zhang, L., Chen, L., Yuan, R., and Hirai, T, Mat. Mat. Trans. 31A, 2369 (2000).Google Scholar
6. Nellis, W.J., Weir, S.T., and Mitchell, A.C., Phys. Rev. B 59, 3434 (1999).Google Scholar
7. Hoover, W.G., Phys. Rev. Lett. 42, 1531 (1979).Google Scholar
8. Hall, C.A., Phys. Plasma 7, 2069 (2000).Google Scholar
9. Hall, C.A., Assay, J.R., Knudsen, M.D., Stygar, W.A.., Spielman, R.B., Pointon, T.D., Reisman, D.B., Toor, A., and Cauble, R.C., Rev. Sci. Instrum. 72, 3587 (2001).Google Scholar
10. Edwards, J., Lorenz, K.T., Remington, B.A., Pollaine, S., Colvin, J., Braun, D., Lasinski, B.F., Reisman, D., McNaney, J.M., Greenough, J.A., Wallace, R., Louis, H., and Kalantar, D., Phys. Rev. Lett. 92, 75002/1 (2004).Google Scholar
11. Martin, L.P., Orlikowski, D. and Nguyen, J.H., Mat. Sci. Eng., A, 427, 83 (2006).Google Scholar
12. Nondestructive Testing Handbook, Vol.7, Birk, A.S., Green, R.E., and P., McIntire, eds. (ASNT, Columbus, OH, 1991), pp. 836–840.Google Scholar
13. Powder Diffraction File Release 2000, (International Centre for Diffraction Data, Newtown Square, PA, 2000), #013-–0504 (Mg2Cu) and #001–1226 (MgCu2).Google Scholar
14. Koster, W. and Rauster, W., Technical Memorandum 1321, National Advisory Committee for Aeronautics, Washington, DC, 1951.Google Scholar
15. Krautkramer, J. and Krautkramer, H., Ultrasonic Testing of Materials (Springer-Verlag, New York, NY, 1990), p. 561.Google Scholar