Effects of deformation inhomogeneity on plastic dissipation in zirconium

H. A. Padilla, C. D. Smith, John Lambros, Armand Joseph Beaudoin, 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 work energy. Previous experiments on high strain-rate deformed zirconium have measured nearly complete dissipation of plastic work as heat for specimens with a non-basal texture. In contrast, basal textured specimens exhibit incomplete dissipation and show evidence of localization by postmortem analysis. Active deformation mechanisms in basal textures include slip in basal oriented grains, and twinning in nonbasal oriented grains. The current study explores the effect of length scale on the development of local stress gradients by comparing strain fields gathered from digital image correlation to the undeformed grain structure and the initial crystallographic orientations as these mechanisms occur. It is seen that the crystallographic texture in basal samples encourages the development of local strain gradients, which at larger bulk strains will eventually lead to macroscale localization.

Original languageEnglish (US)
Title of host publicationSociety for Experimental Mechanics - 11th International Congress and Exhibition on Experimental and Applied Mechanics 2008
Pages1608-1615
Number of pages8
StatePublished - Dec 1 2008
Event11th International Congress and Exhibition on Experimental and Applied Mechanics 2008 - Orlando, FL, United States
Duration: Jun 2 2008Jun 5 2008

Publication series

NameSociety for Experimental Mechanics - 11th International Congress and Exhibition on Experimental and Applied Mechanics 2008
Volume3

Other

Other11th International Congress and Exhibition on Experimental and Applied Mechanics 2008
CountryUnited States
CityOrlando, FL
Period6/2/086/5/08

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

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