Optimizing the procedure of equal-channel angular pressing for maximum superplasticity

Shogo Komura, Minoru Furukawa, Zenji Horita, Minoru Nemoto, Terence G. Langdon

Research output: Contribution to journalArticle

154 Citations (Scopus)

Abstract

The imposition of severe plastic straining on an Al-3% Mg-0.2% Sc alloy through equal-channel angular pressing (ECAP) reduces the grain size to ca. 0.2 μm and provides an opportunity to achieve superplastic elongations at high strain rates. Experiments were conducted to evaluate the procedure for optimizing the ECAP process in order to attain maximum superplastic ductilities. The results show that: (i) high elongations are achieved only after each sample has been subjected to a sufficiently high strain to establish a homogeneous array of grains separated by high angle boundaries and (ii) elongations are a maximum when using processing route BC in which the sample is rotated by 90° in the same sense between each consecutive pressing through the ECAP die.

Original languageEnglish
Pages (from-to)111-118
Number of pages8
JournalMaterials Science and Engineering A
Volume297
Issue number1-2
DOIs
Publication statusPublished - Jan 15 2001

All Science Journal Classification (ASJC) codes

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

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