Using ring samples to evaluate the processing characteristics in high-pressure torsion

Yosuke Harai, Kaveh Edalati, Zenji Horita, Terence G. Langdon

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

An Al-3% Mg-0.2% Sc alloy was processed by high-pressure torsion (HPT) using samples in the form of solid disks and rings. Following HPT, all values of the measured Vickers microhardness fall onto a single curve when plotted against the equivalent strain, such that there are increasing values of hardness at the lower strains and hardness saturation above equivalent strains of ∼40. This saturation level is independent of the number of revolutions and the applied pressure. The grain size following HPT is ∼220 nm, and tensile tests show that the material is superplastic at a testing temperature of 573 K.

Original languageEnglish
Pages (from-to)1147-1153
Number of pages7
JournalActa Materialia
Volume57
Issue number4
DOIs
Publication statusPublished - Feb 1 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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