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The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy

The precipitation behavior of the α strengthening phase in metastable β-Ti alloys is highly dependent on heat treatment parameters such as quenching rate, heating rate and ageing temperature. In this paper we have investigated the influence of quenching rate on the formation of isothermal ω precipit...

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Detalles Bibliográficos
Autores principales: Chen, Jing, Xiao, Wenlong, Dargusch, Matthew Simon, Ma, Chaoli
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598871/
https://www.ncbi.nlm.nih.gov/pubmed/26449879
http://dx.doi.org/10.1038/srep14632
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author Chen, Jing
Xiao, Wenlong
Dargusch, Matthew Simon
Ma, Chaoli
author_facet Chen, Jing
Xiao, Wenlong
Dargusch, Matthew Simon
Ma, Chaoli
author_sort Chen, Jing
collection PubMed
description The precipitation behavior of the α strengthening phase in metastable β-Ti alloys is highly dependent on heat treatment parameters such as quenching rate, heating rate and ageing temperature. In this paper we have investigated the influence of quenching rate on the formation of isothermal ω precipitates that have been regarded as potent nucleant sites for α precipitation. The results show that the β-solutionized alloy contains a β matrix with a layer structured morphology. Regular atomic movement of the (002)(β) plane along the <002> direction was observed in the alloy. The increase in quenching rate refines the thickness of layers, subsequently influencing the nucleation and growth of isothermal ω precipitates after ageing treatment. The high quenching rate promotes the occurrence of ω precipitation, broadens the stage of ω precipitation and increases the number density of ω precipitates. Since the isothermal ω phase provides a heterogeneous nucleation site for α precipitates, it is inferred that the quenching rate may indirectly influence the mechanical properties of metastable β-Ti alloy.
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spelling pubmed-45988712015-10-13 The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy Chen, Jing Xiao, Wenlong Dargusch, Matthew Simon Ma, Chaoli Sci Rep Article The precipitation behavior of the α strengthening phase in metastable β-Ti alloys is highly dependent on heat treatment parameters such as quenching rate, heating rate and ageing temperature. In this paper we have investigated the influence of quenching rate on the formation of isothermal ω precipitates that have been regarded as potent nucleant sites for α precipitation. The results show that the β-solutionized alloy contains a β matrix with a layer structured morphology. Regular atomic movement of the (002)(β) plane along the <002> direction was observed in the alloy. The increase in quenching rate refines the thickness of layers, subsequently influencing the nucleation and growth of isothermal ω precipitates after ageing treatment. The high quenching rate promotes the occurrence of ω precipitation, broadens the stage of ω precipitation and increases the number density of ω precipitates. Since the isothermal ω phase provides a heterogeneous nucleation site for α precipitates, it is inferred that the quenching rate may indirectly influence the mechanical properties of metastable β-Ti alloy. Nature Publishing Group 2015-10-09 /pmc/articles/PMC4598871/ /pubmed/26449879 http://dx.doi.org/10.1038/srep14632 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Chen, Jing
Xiao, Wenlong
Dargusch, Matthew Simon
Ma, Chaoli
The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy
title The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy
title_full The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy
title_fullStr The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy
title_full_unstemmed The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy
title_short The Dependence of Isothermal ω Precipitation on the Quenching Rate in a Metastable β-Ti Alloy
title_sort dependence of isothermal ω precipitation on the quenching rate in a metastable β-ti alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4598871/
https://www.ncbi.nlm.nih.gov/pubmed/26449879
http://dx.doi.org/10.1038/srep14632
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