The Effects of Prior Cold Work on the Shock Response of Copper

J. C.F. Millett, D. L. Higgins, D. J. Chapman, G. Whiteman, I. P. Jones, Y. L. Chiu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A series of experiments have been performed to probe the effects of dislocation density on the shock response of copper. The shear strength immediately behind the shock front has been measured using embedded manganin stress gauges, whilst the post shock microstructural and mechanical response has been monitored via one-dimensional recovery experiments. Material in the half hard (high dislocation density) condition was shown to have both a higher shear strength and higher rate of change of shear strength with impact stress than its annealed (low dislocation density) counterpart. Microstructural analysis showed a much higher dislocation density in the half hard material compared to the annealed after shock loading, whilst post shock mechanical examination showed a significant degree of hardening in the annealed state with reduced, but still significant amount in the half hard state, thus showing a correlation between temporally resolved stress gauge measurements and post shock microstructural and mechanical properties.

Original languageEnglish
Pages (from-to)211-221
Number of pages11
JournalJournal of Dynamic Behavior of Materials
Volume4
Issue number2
Early online date24 Apr 2018
DOIs
Publication statusPublished - 1 Jun 2018

Keywords

  • Copper
  • Microstructure
  • Shock compression
  • Strength

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Mechanics of Materials

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