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

被引：19

作者：

Ashida, Maki ^{[1
]}

Chen, Peng ^{[1
]}

Doi, Hisashi ^{[1
]}

Tsutsumi, Yusuke ^{[1
]}

Hanawa, Takao ^{[1
]}

Horita, Zenji ^{[2
,3
]}

机构：

[1] Tokyo Med & Dent Univ, Inst Biomat & Bioengn, Chiyoda Ku, Tokyo 1010062, Japan

[2] Kyushu Univ, Dept Mat Sci & Engn, Nishi Ku, Fukuoka 8190395, Japan

[3] Kyushu Univ, WPI, Int Inst Carbon Neutral Energy Res WPI I2CNER, Nishi Ku, Fukuoka 8190395, Japan

来源：

11TH INTERNATIONAL CONFERENCE ON TECHNOLOGY OF PLASTICITY, ICTP 2014 | 2014年 / 81卷

关键词：

Titanium alloy; Mechanical properties; High-pressure torsion; ALLOY; TI;

D O I：

10.1016/j.proeng.2014.10.184

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 high-pressure 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 high-pressure 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. (C) 2014 Published by Elsevier Ltd.

引用

页码：1523 / 1528

页数：6

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