Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy

Alloying elements have great influence on mechanical properties of metals. Combining dislocation characterization and in-situ transmission electron microscope straining at ambient and liquid-nitrogen temperature in high-purity titanium and Ti-5at%Al, we investigated the modulation of Al on dislocati...

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Autores principales: Zhao, Beikai, Huang, Peng, Zhang, Libo, Li, Suzhi, Zhang, Ze, Yu, Qian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7033204/
https://www.ncbi.nlm.nih.gov/pubmed/32080279
http://dx.doi.org/10.1038/s41598-020-60013-6
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author Zhao, Beikai
Huang, Peng
Zhang, Libo
Li, Suzhi
Zhang, Ze
Yu, Qian
author_facet Zhao, Beikai
Huang, Peng
Zhang, Libo
Li, Suzhi
Zhang, Ze
Yu, Qian
author_sort Zhao, Beikai
collection PubMed
description Alloying elements have great influence on mechanical properties of metals. Combining dislocation characterization and in-situ transmission electron microscope straining at ambient and liquid-nitrogen temperature in high-purity titanium and Ti-5at%Al, we investigated the modulation of Al on dislocation behaviours as temperature changed. It reveals that segregation of Al at edge dislocation cores in Ti-5at%Al generates strong obstacles, promoting room temperature cross-slips. However, the effect of Al on reducing stacking-fault energy (SFE) as decreasing temperature is significant. Consequently, the lower SFE in Ti-5at%Al results in ordinary planar dislocation slip while massive dislocation cross-slips occurred in Ti at liquid-nitrogen temperature.
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spelling pubmed-70332042020-02-28 Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy Zhao, Beikai Huang, Peng Zhang, Libo Li, Suzhi Zhang, Ze Yu, Qian Sci Rep Article Alloying elements have great influence on mechanical properties of metals. Combining dislocation characterization and in-situ transmission electron microscope straining at ambient and liquid-nitrogen temperature in high-purity titanium and Ti-5at%Al, we investigated the modulation of Al on dislocation behaviours as temperature changed. It reveals that segregation of Al at edge dislocation cores in Ti-5at%Al generates strong obstacles, promoting room temperature cross-slips. However, the effect of Al on reducing stacking-fault energy (SFE) as decreasing temperature is significant. Consequently, the lower SFE in Ti-5at%Al results in ordinary planar dislocation slip while massive dislocation cross-slips occurred in Ti at liquid-nitrogen temperature. Nature Publishing Group UK 2020-02-20 /pmc/articles/PMC7033204/ /pubmed/32080279 http://dx.doi.org/10.1038/s41598-020-60013-6 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhao, Beikai
Huang, Peng
Zhang, Libo
Li, Suzhi
Zhang, Ze
Yu, Qian
Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy
title Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy
title_full Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy
title_fullStr Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy
title_full_unstemmed Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy
title_short Temperature Effect on Stacking Fault Energy and Deformation Mechanisms in Titanium and Titanium-aluminium Alloy
title_sort temperature effect on stacking fault energy and deformation mechanisms in titanium and titanium-aluminium alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7033204/
https://www.ncbi.nlm.nih.gov/pubmed/32080279
http://dx.doi.org/10.1038/s41598-020-60013-6
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