Electrical resistivity mapping of titanium and zirconium discs processed by high-pressure torsion for homogeneity and phase transformation evaluation

Rin Haraguchi, Yuuki Yoshimatsu, Takashi Nagaoka, Makoto Arita, Kaveh Edalati, Zenji Horita

    研究成果: Contribution to journalArticle査読

    10 被引用数 (Scopus)

    抄録

    High-pressure torsion (HPT) was applied to discs of pure Ti and Zr under pressures of 2 and 6 GPa, and the evolution of electrical resistivity was investigated. The electrical resistivity increased with increasing the distance from the disc centre in both Ti and Zr, but the distribution of electrical resistivity became more homogenous with increasing the number of HPT turns, i.e. with increasing the shear strain. The electrical resistivity increased more significantly when Ti and Zr were processed under 6 GPa because of the formation of high-pressure ω phase. The distribution of hardness with distance from disc centre and number of HPT turns were basically similar to those of electrical resistivity distribution. In situ electrical resistivity measurements during heating confirmed that the ω-Zr phase was thermally more stable than the ω-Ti phase.

    本文言語英語
    ページ(範囲)6778-6788
    ページ数11
    ジャーナルJournal of Materials Science
    52
    11
    DOI
    出版ステータス出版済み - 6 1 2017

    All Science Journal Classification (ASJC) codes

    • 材料科学(全般)
    • 材料力学
    • 機械工学

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