Variation of work hardening rate by oxygen contents in pure titanium alloy

被引：64

作者：

Kang, Duck-soo ^{[1
,2
]}

Lee, Kwang-jin ^{[1
]}

Kwon, Eui-pyo ^{[1
]}

Tsuchiyama, Toshihiro ^{[2
,3
]}

Takaki, Setsuo ^{[2
,3
]}

机构：

[1] Korea Inst Ind Technol KITECH, Convergence Components & Agr Machinery Applicat C, Jeonju 561202, South Korea

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

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

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 632卷

基金：

日本学术振兴会;

关键词：

Oxygen; Work hardening rate; Deformation behavior; Pure titanium alloy; MECHANICAL-PROPERTIES; ALPHA-TITANIUM; DEFORMATION MECHANISMS; STRAIN; TI; TEMPERATURES; KINETICS; METALS; SLIP;

D O I：

10.1016/j.msea.2015.02.074

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Pure titanium-oxygen alloys with different oxygen contents were tensile-tested to investigate the effect of oxygen on work hardening rate and deformation behavior. Yield and ultimate tensile strengths markedly increased with increasing oxygen contents, although the elongations were decreased. Work hardening rate was also enhanced with increasing oxygen contents resulting in increase in the uniform elongation. The improved work hardening rate was ascribed to transition of primary deformation mode from twin deformation to dislocation slip by oxygen addition. When twin deformation is suppressed by oxygen addition, however, the < c+a > dislocation must function as a substitute for twinning to permit the homogeneous plastic deformation. It contributed that the improved work hardening rate without deformation twinning is thought to be a restriction of dislocation slips to a certain special plane by oxygen addition. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：120 / 126

页数：7

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