Evolution of microstructure and plastic dissipation in zirconium during high rate deformation

H. A. Padilla, C. D. Smith, Armand Joseph Beaudoin, John Lambros, I. M. Robertson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The adiabatic compression of metals in the split-Hopkinson pressure bar is associated with a rise in temperature due to the dissipation of mechanical work. This study uses high speed infrared detectors to measure the ratio of heat dissipation rate to work rate, for oxygen free high conductivity (OFHC) copper and commercially pure (CP) zirconium. Deformed samples are examined using TEM and electron back-scatter diffraction (EBSD) to provide indication of the underlying mechanisms of deformation (specifically, the presence and type of deformation twins). Past research indicates that the rate of heat dissipation approaches the rate of work done after moderate to large strains. We examine this relationship between dissipation and work by contrasting the response of OFHC copper and zirconium. We also probe the directional dependence in cross-rolled zirconium, noting a difference in the degree of twinning with loading direction. The combined use of high speed infrared detectors with EBSD analysis and TEM are intended to provide insight as to mechanisms underlying internal energy storage, not accessible through stress-strain behavior and heat dissipation data alone.

Original languageEnglish (US)
Title of host publicationProceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Pages824-828
Number of pages5
Volume2
StatePublished - 2006
EventSEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006 - Saint Louis, MO, United States
Duration: Jun 4 2006Jun 7 2006

Other

OtherSEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
CountryUnited States
CitySaint Louis, MO
Period6/4/066/7/06

ASJC Scopus subject areas

  • Engineering(all)

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