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Effect of laser shock processing on the microstructure and mechanical properties of pure Cu

  • Geoffrey H. Campbell EMAIL logo and Mukul Kumar
Published/Copyright: January 11, 2022
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Abstract

Pure annealed Cu was subjected to shocks produced by a high power laser, producing shock pressures of about 5 GPa. The shock waves traveled through the 1 mm thick specimens. The shocks were found to modify the microstructure of the metal primary through the introduction of a large concentration of dislocations. The mechanical properties of the shock processed Cu were measured by tensile testing and compared to the unshocked material. The shock processing causes an increase in the yield stress, a decrease in the initial work hardening rate, and a decrease in the strain to failure. The deformation microstructures were characterized and found to be consistent with the observed mechanical behavior.


Dr. G. H. Campell Lawrence Livermore National Laboratory Mailstop L–356 P. O. Box 808 7000 East Ave., Livermore, CA 94550, USA Tel.: +1 925 423 8276 Fax: +1 925 424 4737
Dedicated to Professor Dr. Dr. h. c. Manfred Rühle on the occasion of his 65th birthday

Funding statement: We thank M. M. LeBlanc for overseeing the mechanical tests, R. A. Bliss for TEM specimen preparation and scanning electron microscopy, and L. Nguyen for EBSD specimen preparation and thermomechanical processing of Cu. We thank L. Hackel for LSP of Cu. This work supported by the Laboratory Directed Research and Development Program at LLNL. This work performed under the auspices of the United States Department of Energy and the Lawrence Livermore National Laboratory under contract number W-7405-Eng-48.

References

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Received: 2002-09-30
Published Online: 2022-01-11

© 2003 Carl Hanser Verlag, München

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