Application of high pressure torsion to bulk samples

Genki Sakai, Katsuaki Nakamura, Zenji Horita, Terence G. Langdon

    研究成果: Chapter in Book/Report/Conference proceedingConference contribution

    12 被引用数 (Scopus)

    抄録

    High pressure torsion (HPT) is a well-known procedure to impart severe plastic deformation (SPD) into metallic materials. It was reported that HPT produces grain sizes finer than those using other SPD processes such as equal-channel angular pressing (ECAP). However, the application of HPT has been restricted to thin disk samples. In this study, an HPT process was developed for use with bulk samples. This process is designated as Bulk-HPT for comparison with conventional Disk-HPT. Cylindrical samples of an Al-3%Mg-0.2%Sc alloy having dimensions of 10 mm in diameter and 8.6 mm in height were prepared for Bulk-HPT. The samples were strained under a pressure of 1 GPa for 2 turns at room temperature. Microstractural observations revealed that the samples contained regions having a grain size of ∼ 130 nm. Tensile testing showed a superplastic ductility ∼480 % at 673 K with an initial strain rate of 3.3×10-2 s-1.

    本文言語英語
    ホスト出版物のタイトルNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
    ページ391-396
    ページ数6
    出版ステータス出版済み - 12 1 2006
    イベント3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, 日本
    継続期間: 9 22 20059 26 2005

    出版物シリーズ

    名前Materials Science Forum
    503-504
    ISSN(印刷版)0255-5476

    その他

    その他3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
    Country日本
    CityFukuoka
    Period9/22/059/26/05

    All Science Journal Classification (ASJC) codes

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

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