Origin of dramatic oxygen solute strengthening effect in titanium
Abstract
Screw dislocations: A hard case to crack The motion of dislocations or defects in a metal influences its strength and toughness. If these defects can be “pinned” by adding alloying elements, it should be possible to create a stronger alloy. It was thought that there shouldn't be much of an interaction between screw dislocations and any alloying elements. However, Yu et al. show that for α-Ti, the profound hardening effect of oxygen is due to the strong interactions with the core of the dislocations. First-principles calculations reveal that distortion of the interstitial sites at the dislocation core creates a very strong but short-range repulsion for oxygen atoms. Science , this issue p. 635
- Authors:
-
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA., National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA.
- Department of Materials Science and Engineering, University of California, Berkeley, CA, USA.
- Nuclear Science and Engineering Directorate, Japan Atomic Energy, Tokai-mura, Ibaraki, Japan.
- Rolls Royce, Derby DE24 8BJ, UK.
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1353290
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- Science
- Additional Journal Information:
- Journal Name: Science Journal Volume: 347 Journal Issue: 6222; Journal ID: ISSN 0036-8075
- Publisher:
- American Association for the Advancement of Science (AAAS)
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Yu, Qian, Qi, Liang, Tsuru, Tomohito, Traylor, Rachel, Rugg, David, Morris, Jr., J. W., Asta, Mark, Chrzan, D. C., and Minor, Andrew M. Origin of dramatic oxygen solute strengthening effect in titanium. United States: N. p., 2015.
Web. doi:10.1126/science.1260485.
Yu, Qian, Qi, Liang, Tsuru, Tomohito, Traylor, Rachel, Rugg, David, Morris, Jr., J. W., Asta, Mark, Chrzan, D. C., & Minor, Andrew M. Origin of dramatic oxygen solute strengthening effect in titanium. United States. https://doi.org/10.1126/science.1260485
Yu, Qian, Qi, Liang, Tsuru, Tomohito, Traylor, Rachel, Rugg, David, Morris, Jr., J. W., Asta, Mark, Chrzan, D. C., and Minor, Andrew M. Fri .
"Origin of dramatic oxygen solute strengthening effect in titanium". United States. https://doi.org/10.1126/science.1260485.
@article{osti_1353290,
title = {Origin of dramatic oxygen solute strengthening effect in titanium},
author = {Yu, Qian and Qi, Liang and Tsuru, Tomohito and Traylor, Rachel and Rugg, David and Morris, Jr., J. W. and Asta, Mark and Chrzan, D. C. and Minor, Andrew M.},
abstractNote = {Screw dislocations: A hard case to crack The motion of dislocations or defects in a metal influences its strength and toughness. If these defects can be “pinned” by adding alloying elements, it should be possible to create a stronger alloy. It was thought that there shouldn't be much of an interaction between screw dislocations and any alloying elements. However, Yu et al. show that for α-Ti, the profound hardening effect of oxygen is due to the strong interactions with the core of the dislocations. First-principles calculations reveal that distortion of the interstitial sites at the dislocation core creates a very strong but short-range repulsion for oxygen atoms. Science , this issue p. 635},
doi = {10.1126/science.1260485},
journal = {Science},
number = 6222,
volume = 347,
place = {United States},
year = {Fri Feb 06 00:00:00 EST 2015},
month = {Fri Feb 06 00:00:00 EST 2015}
}
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