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The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys

Oxygen is always a constituent in “real” titanium alloys including titanium alloy powders used for powder-based additive manufacturing (AM). In addition, oxygen uptake during powder handling and printing is hard to control and, hence, it is important to understand and predict how oxygen is affecting...

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Detalles Bibliográficos
Autores principales: Lindwall, Greta, Wang, Peisheng, Kattner, Ursula R., Campbell, Carelyn E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6417434/
https://www.ncbi.nlm.nih.gov/pubmed/30956517
http://dx.doi.org/10.1007/s11837-018-3008-8
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author Lindwall, Greta
Wang, Peisheng
Kattner, Ursula R.
Campbell, Carelyn E.
author_facet Lindwall, Greta
Wang, Peisheng
Kattner, Ursula R.
Campbell, Carelyn E.
author_sort Lindwall, Greta
collection PubMed
description Oxygen is always a constituent in “real” titanium alloys including titanium alloy powders used for powder-based additive manufacturing (AM). In addition, oxygen uptake during powder handling and printing is hard to control and, hence, it is important to understand and predict how oxygen is affecting the microstructure. Therefore, oxygen is included in the evaluation of the thermodynamic properties of the titanium-vanadium system employing the CALculation of PHAse Diagrams method and a complete model of the O-Ti-V system is presented. The β-transus temperature is calculated to increase with increasing oxygen content whereas the extension of the α-Ti phase field into the binary is calculated to decrease, which explains the low vanadium solubilities measured in some experimental works. In addition, the critical temperature of the metastable miscibility gap of the β-phase is calculated to increase to above room temperature when oxygen is added. The effects of oxygen additions on phase fractions, martensite and ω formation temperatures are discussed, along with the impacts these changes may have on AM of titanium alloys.
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spelling pubmed-64174342019-04-03 The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys Lindwall, Greta Wang, Peisheng Kattner, Ursula R. Campbell, Carelyn E. JOM (1989) Additive Manufacturing of Ti Components Oxygen is always a constituent in “real” titanium alloys including titanium alloy powders used for powder-based additive manufacturing (AM). In addition, oxygen uptake during powder handling and printing is hard to control and, hence, it is important to understand and predict how oxygen is affecting the microstructure. Therefore, oxygen is included in the evaluation of the thermodynamic properties of the titanium-vanadium system employing the CALculation of PHAse Diagrams method and a complete model of the O-Ti-V system is presented. The β-transus temperature is calculated to increase with increasing oxygen content whereas the extension of the α-Ti phase field into the binary is calculated to decrease, which explains the low vanadium solubilities measured in some experimental works. In addition, the critical temperature of the metastable miscibility gap of the β-phase is calculated to increase to above room temperature when oxygen is added. The effects of oxygen additions on phase fractions, martensite and ω formation temperatures are discussed, along with the impacts these changes may have on AM of titanium alloys. Springer US 2018-07-11 2018 /pmc/articles/PMC6417434/ /pubmed/30956517 http://dx.doi.org/10.1007/s11837-018-3008-8 Text en © The Author(s) 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Additive Manufacturing of Ti Components
Lindwall, Greta
Wang, Peisheng
Kattner, Ursula R.
Campbell, Carelyn E.
The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys
title The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys
title_full The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys
title_fullStr The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys
title_full_unstemmed The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys
title_short The Effect of Oxygen on Phase Equilibria in the Ti-V System: Impacts on the AM Processing of Ti Alloys
title_sort effect of oxygen on phase equilibria in the ti-v system: impacts on the am processing of ti alloys
topic Additive Manufacturing of Ti Components
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6417434/
https://www.ncbi.nlm.nih.gov/pubmed/30956517
http://dx.doi.org/10.1007/s11837-018-3008-8
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