Superplastic properties of ultrafine-grained Mg alloys processed by extrusion plus equal-channel angular pressing

Yuichi Miyahara, Kiyoshi Matsubara, Koji Neishi, Zenji Horita, Terence G. Langdon

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

The process of extrusion followed by equal-channel angular pressing (ECAP), designated as EX-ECAP, was applied to a model cast Mg alloy containing 7.5wt%Al and 0.2wt%Zr and a commercial cast AZ61 alloy for grain refinement to the submicrometer range. The thermal stability of the fine-grained structure was examined by conducting static annealing experiments. In order to increase the area fraction of high-angle boundaries, additional ECAP was attempted at a higher temperature. Tensile testing was conducted on the fine-grained alloy at elevated temperatures. It is shown that low-temperature superplasticity or high-strain rate superplasticity may be achieved in the fine-grained sample processed by EX-ECAP.

Original languageEnglish
Pages (from-to)551-556
Number of pages6
JournalMaterials Science Forum
Volume419-422
Issue numberI
DOIs
Publication statusPublished - Jan 1 2003
EventProceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan
Duration: Jan 26 2003Jan 30 2003

All Science Journal Classification (ASJC) codes

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

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