TY - JOUR
T1 - Variation of work hardening rate by oxygen contents in pure titanium alloy
AU - Kang, Duck Soo
AU - Lee, Kwang Jin
AU - Kwon, Eui Pyo
AU - Tsuchiyama, Toshihiro
AU - Takaki, Setsuo
N1 - Funding Information:
This study was supported by the Grant-in-Aid for Scientific Research (C) No. 23560840 (2011–2013) from Japan Society for the Promotion of Science and the International Institute for Carbon Neutral Energy Research (WPI-I2CNER) , sponsored by the Japanese Ministry of Education, Culture, Sports, Science and Technology.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/4/4
Y1 - 2015/4/4
N2 - 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.
AB - 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.
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U2 - 10.1016/j.msea.2015.02.074
DO - 10.1016/j.msea.2015.02.074
M3 - Article
AN - SCOPUS:84924965911
VL - 632
SP - 120
EP - 126
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
ER -