Microstructural and mechanical characteristics of AZ61 magnesium alloy processed by high-pressure torsion

Yosuke Harai, Masaaki Kai, Kenji Kaneko, Zenji Horita, Terence G. Langdon

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)

Abstract

Experiments were conducted on an AZ61 magnesium alloy to evaluate the microstructural characteristics and the mechanical properties after processing by High-Pressure Torsion (HPT). The results show that processing by HPT produces excellent grain refinement with average grain sizes of ∼0.22 and ∼0.11 urn after processing at 423 K and room temperature, respectively. Tensile testing after HPT revealed the potential for achieving superplastic elongations with a maximum recorded elongation of 620% when testing at a temperature of 473 K. Using microhardness measurements, it is demonstrated that the the microstructure gradually evolves with increasing torsional straining in HPT so that ultimately there is a reasonably homogeneous structure across the disk.

Original languageEnglish
Pages (from-to)76-83
Number of pages8
JournalMaterials Transactions
Volume49
Issue number1
DOIs
Publication statusPublished - Jan 1 2008

All Science Journal Classification (ASJC) codes

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

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