High-pressure torsion for ring samples in different thicknesses

Hideaki Iwaoka, Yosuke Harai, Zenji Horita

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)


    High-pressure torsion (HPT) was conducted with ring samples of pure Al (99.99%) having different thicknesses. They were cut from an Al plate with 10 mm thickness to dimensions having inner and outer diameters of 23 and 30 mm with thicknesses of 2 mm or 4 mm. HPT was conducted at room temperature under a pressure of 1 GPa at a rotation speed of 1 rpm. It is shown that the strain was introduced more intensely in the mid part on the cross section. This strained region extended with increasing number of revolution and covered throughout the cross section in the 2 mm thickness ring after 30 revolutions. The intense-strained region extended to ∼3 mm in the 4 mm thickness ring after 30 revolutions but remains almost the same even after 100 revolutions. The thickness of ∼3 mm may be an upper limit to achieve homogeneous introduction of the strained region throughout the cross section.

    Original languageEnglish
    Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD5
    PublisherTrans Tech Publications Ltd
    Number of pages6
    ISBN (Print)9783037850077
    Publication statusPublished - 2011

    Publication series

    NameMaterials Science Forum
    ISSN (Print)0255-5476
    ISSN (Electronic)1662-9752

    All Science Journal Classification (ASJC) codes

    • General Materials Science
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering


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