Influence of ultrafine-grained structure produced by equal-channel angular pressing on the dynamic response of pure copper

Ivan Smirnov, Alexander Konstantinov

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

3 Scopus citations

Abstract

Metallic materials with a nanocrystalline or ultrafine-grained (UFG) structure can exhibit increased strength, albeit with reduced ductility. The behaviour of such materials under high-speed and impact loads has been insufficiently explored. This work presents experimental results on the dynamic response of UFG pure copper (99.95%) processed by equal-channel angular pressing (ECAP) in comparison with its initial coarse-grained (CG) structure. The yield strength in the case of compression tests of cylindrical samples and the energy consumed for deformation and fracture in the case of a three-point bending of a beam with a V-notch are considered. The UFG copper has higher yield strength in compression tests, but its sensitivity to the loading rate is significantly less than that of the CG initial material and depends on the number of ECAP passes. The UFG material shows higher impact toughness KCV and energy consumption for the entire process of deformation and fracture under impact three-point bending.

Original languageEnglish
Title of host publicationECF22 - LOADING AND ENVIRONMENTAL EFFECTS ON STRUCTURAL INTEGRITY
EditorsA Sedmak, Z Radakovic, M Rakin
PublisherElsevier
Pages1336-1341
Number of pages6
DOIs
StatePublished - 1 Jan 2018
Event22nd European Conference on Fracture, ECF 2018 - Belgrade, Serbia
Duration: 25 Aug 201826 Aug 2018

Publication series

NameProcedia Structural Integrity
PublisherELSEVIER SCIENCE BV
Volume13
ISSN (Print)2452-3216

Conference

Conference22nd European Conference on Fracture, ECF 2018
Abbreviated titleECF22
CountrySerbia
CityBelgrade
Period25/08/1826/08/18

Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Civil and Structural Engineering
  • Materials Science(all)

Keywords

  • Consumed energy
  • Dynamic bending
  • Dynamic compression
  • Equal channel angular pressing
  • Pure copper
  • Ultrafine-grained
  • Yield stress

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