Strain rate sensitivity studies in an ultrafine-grained Al-30wt.% Zn alloy using micro- and nanoindentation

Nguyen Q. Chinh, Tamás Csanádi, Tivadar Gyori, Ruslan Z. Valiev, Boris B. Straumal, Megumi Kawasaki, Terence G. Langdon

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The characteristics of plastic deformation of an ultrafine-grained (UFG) Al-30. wt.% Zn alloy were investigated using depth-sensing micro- and nanoindentation. Emphasis was placed on the effects of grain boundaries and the unusually high strain rate sensitivity. It is shown that there is a close relationship between enhanced strain rate sensitivity and ductility in this UFG material and this is associated with grain boundary sliding and enhanced diffusion along the Al/Al grain boundaries which appear to be wetted by Zn-rich layers.

Original languageEnglish
Pages (from-to)117-120
Number of pages4
JournalMaterials Science and Engineering A
Publication statusPublished - May 1 2012



  • Grain boundary sliding
  • Micro and nanoindentation
  • Strain rate sensitivity
  • Ultrafine-grained materials
  • Wetted boundaries

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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