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

8 Citations (Scopus)

Abstract

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
Volume81
DOIs
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

  • Engineering(all)

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