Application of high-pressure torsion to Al-6 %Cu-0.4 %Zr alloy for ultrafine-grain refinement and superplasticity

Ali Alhamidi, Zenji Horita

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

An Al-6 %Cu-0.4 %Zr alloy was processed by high-pressure torsion to produce an ultrafine-grained structure with a grain size of ~200 nm at the steady-state level where the hardness remains constant with straining. Tensile testing showed that a maximum elongation of ~530 % was attained at 673 K with an initial strain rate of 1 × 10-3 s-1. Evaluation of the strain-rate sensitivity and the activation energy for the deformation confirmed that grain boundary sliding through grain boundary diffusion is the rate-controlling process for the superplastic deformation.

Original languageEnglish
Pages (from-to)6689-6695
Number of pages7
JournalJournal of Materials Science
Volume49
Issue number19
DOIs
Publication statusPublished - Oct 2014

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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