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

    92 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 2008

    All Science Journal Classification (ASJC) codes

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

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