Effect of sulfur on the ductility of copper shaped-charge jets

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We have observed that a change in bulk sulfur (S) content imposed by doping has a marked effect on ductility of copper shaped-charge jets as measured by breakup times and length-to-diameter ratios of the particulated jet. Baseline material was Oxygen-Free-Electronic (ofe) copper with a S concentration of 3-4 ppM. Several liners were doped using a Cu sulfide powder pack method to increase the S level up to 9 ppM, while keeping other impurities and microstructure unchanged. Using flash x-ray radiographs to record the formation of jets, both the length-to-diameter ratios of the jet particles and breakup times were measured. Increasing ... continued below

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Lassila, D.H.; Chan, D.K.; King, W.E.; Schwartz, A.J. & Baker, E.L. July 1, 1996.

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We have observed that a change in bulk sulfur (S) content imposed by doping has a marked effect on ductility of copper shaped-charge jets as measured by breakup times and length-to-diameter ratios of the particulated jet. Baseline material was Oxygen-Free-Electronic (ofe) copper with a S concentration of 3-4 ppM. Several liners were doped using a Cu sulfide powder pack method to increase the S level up to 9 ppM, while keeping other impurities and microstructure unchanged. Using flash x-ray radiographs to record the formation of jets, both the length-to-diameter ratios of the jet particles and breakup times were measured. Increasing the bulk S content of ofe Cu to 9 ppM, the breakup times decreased from 186 to 147 {mu}s, while the length-to- diameter ratios observed at 260 {mu}s decreased from 8:1 to 5:1. Since the solubility of S in Cu at the processing temperatures is extremely low, we conclude that the bulk rise in S content is due to S segregating to the grain boundaries. Thus, the decrease in ductility of liners doped with S appears directly related to the S content at the grain boundaries.

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10 p.

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OSTI as DE96013876

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  • 16. international symposium on ballistics, San Francisco, CA (United States), 23-28 Sep 1996

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  • Other: DE96013876
  • Report No.: UCRL-JC--123068
  • Report No.: CONF-960982--4
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 288430
  • Archival Resource Key: ark:/67531/metadc664130

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  • July 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • June 22, 2016, 7:07 p.m.

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Lassila, D.H.; Chan, D.K.; King, W.E.; Schwartz, A.J. & Baker, E.L. Effect of sulfur on the ductility of copper shaped-charge jets, article, July 1, 1996; California. (digital.library.unt.edu/ark:/67531/metadc664130/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.