Variations in hardness with position in one dimensionally recovered shock loaded metals

Research output: Contribution to journalConference articlepeer-review

Authors

  • G. Whiteman
  • D.L. Higgins
  • B. Pang
  • J.C.F. Millett
  • Y.-L. Chiu

Colleges, School and Institutes

Abstract

The microstructural and mechanical response of materials to shock loading is of the utmost importance in the development of constitutive models for high strain-rate applications. However, unlike a purely mechanical response, to ensure that the microstructure has been generated under conditions of pure one dimensional strain, the target assembly requires both a complex array of momentum traps to prevent lateral releases entering the specimen location from the edges and spall plates to prevent tensile interactions (spall) affecting the microstructure. In this paper, we examine these effects by performing microhardness profiles of shock loaded copper and tantalum samples. In general, variations in hardness both parallel and perpendicular to the shock direction were small indicating successful momentum trapping. Variations in hardness at different locations relative to the impact face are discussed in terms of the initial degree of cold work and the ability to generate and move dislocations in the samples.

Details

Original languageEnglish
Article number02013
Number of pages5
JournalEPJ Web of Conferences
Volume183
Early online date7 Sep 2018
Publication statusE-pub ahead of print - 7 Sep 2018
Event12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading - Arcachon, France
Duration: 10 Sep 201814 Sep 2018