Microstructures and Mechanical Properties of Ti-6Al-7Nb Processed by High-pressure Torsion

• DOI: 10.1016/j.proeng.2014.10.184
• Publication Date: 2014-10-15T17:53:17Z
• Authors: Maki Ashida; Peng Chen; Hisashi Doi; Yusuke Tsutsumi; Takao Hanawa; Zenji Horita
• Keywords: High-pressure torsion; 0205 materials engineering; Mechanical properties; 02 engineering and technology; Titanium alloy; Engineering(all)

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