Microstructures and mechanical properties of Ti-6Al-7Nb processed by high-pressure torsion

Maki Ashida, Peng Chen, Hisashi Doi, Yusuke Tsutsumi, Takao Hanawa, Zenji Horita

    Research output: Contribution to journalConference articlepeer-review

    19 Citations (Scopus)


    Ti-6Al-7Nb was deformed by high-pressure torsion to improve the mechanical properties of the alloy. high-pressure torsion was conducted at room temperature under pressures of 2 and 6 GPa for disk-shaped specimens. Microstructure was characterized by transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD). Mechanical properties were evaluated by tensile test and Vickers microhardness measurement. The grain size was refined to about 100 nm after highpressure torsion processing under 6 GPa through 5 revolutions. Hardness increased with straining by high-pressure torsion and the values after high-pressure torsion processing under 6 GPa were higher than those under 2 GPa. Tensile strength after highpressure torsion processing of all conditions was higher than that before high-pressure torsion processing. It was found that microstructure and mechanical properties were improved by high-pressure torsion processing.

    Original languageEnglish
    Pages (from-to)1523-1528
    Number of pages6
    JournalProcedia Engineering
    Publication statusPublished - 2014
    Event11th International Conference on Technology of Plasticity, ICTP 2014 - Nagoya, Japan
    Duration: Oct 19 2014Oct 24 2014

    All Science Journal Classification (ASJC) codes

    • General Engineering


    Dive into the research topics of 'Microstructures and mechanical properties of Ti-6Al-7Nb processed by high-pressure torsion'. Together they form a unique fingerprint.

    Cite this