The influence of zirconium content on the microstructure, mechanical properties, and biocompatibility of in-situ alloying Ti-Nb-Ta based β alloys processed by selective laser melting

Weihuan Kong; Sophie C. Cox; Yu Lu; Victor Villapun; Xiaoling Xiao; Wenyou Ma; Min Liu; Moataz M. Attallah

doi:10.1016/j.msec.2021.112486

The influence of zirconium content on the microstructure, mechanical properties, and biocompatibility of in-situ alloying Ti-Nb-Ta based β alloys processed by selective laser melting

Weihuan Kong, Sophie C. Cox, Yu Lu, Victor Villapun, Xiaoling Xiao, Wenyou Ma, Min Liu^*, Moataz M. Attallah

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

This study investigates Ti-Nb-Ta based β alloys with different zirconium additions (0, 5, 9 wt%) manufactured by SLM. A low level of as-fabricated defects is obtained: the relative density of TNT (Z) alloys is >99.97% with the keyhole size in a range of 3–20 μm. BF TEM images combining SAD patterns of TNT(Z) alloys show single β phase obtained inside the beta matrix; BF-STEM images reveal potential nano-scale grain boundary alpha phase precipitation. Zirconium functions as a neutral element in these high β-stabilized Ti-Nb-Ta based alloys. An increase in Vickers hardness and UTS caused by zirconium additions is observed, which is explained by beta grain refinement because higher degree of undercooling occurs. Corrosion ions of TNT(Z) alloys released from immersion testing at each time intervals show extremely small concentrations (<10 μg/L). It indicated that good biocompatibility during culture with the negligible corrosion ions. High strength-to-modulus ratio β Ti alloys together with excellent biological response show their prospect for biomedical applications.

Original language	English
Article number	112486
Number of pages	14
Journal	Materials Science and Engineering C
Volume	131
Early online date	14 Oct 2021
DOIs	https://doi.org/10.1016/j.msec.2021.112486
Publication status	Published - Dec 2021

Bibliographical note

Funding Information:
WK acknowledges the financial support for the TEM characterization work provided by Institute of New Materials, Guangdong Academy of Sciences (PI: MMA, grant: 17-0551 ), as well as the chemical analysis from School of Geography, Earth and Environmental Sciences, University of Birmingham .

Publisher Copyright:
© 2021

Keywords

Equiaxed microstructure
In-situ alloying
Static immersion testing
Strength-to-modulus ratio
Ti-Nb-Ta based β alloys
Zirconium addition

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Kong, W., Cox, S. C., Lu, Y., Villapun, V., Xiao, X., Ma, W., Liu, M., & Attallah, M. M. (2021). The influence of zirconium content on the microstructure, mechanical properties, and biocompatibility of in-situ alloying Ti-Nb-Ta based β alloys processed by selective laser melting. Materials Science and Engineering C, 131, Article 112486. https://doi.org/10.1016/j.msec.2021.112486

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abstract = "This study investigates Ti-Nb-Ta based β alloys with different zirconium additions (0, 5, 9 wt%) manufactured by SLM. A low level of as-fabricated defects is obtained: the relative density of TNT (Z) alloys is >99.97% with the keyhole size in a range of 3–20 μm. BF TEM images combining SAD patterns of TNT(Z) alloys show single β phase obtained inside the beta matrix; BF-STEM images reveal potential nano-scale grain boundary alpha phase precipitation. Zirconium functions as a neutral element in these high β-stabilized Ti-Nb-Ta based alloys. An increase in Vickers hardness and UTS caused by zirconium additions is observed, which is explained by beta grain refinement because higher degree of undercooling occurs. Corrosion ions of TNT(Z) alloys released from immersion testing at each time intervals show extremely small concentrations (<10 μg/L). It indicated that good biocompatibility during culture with the negligible corrosion ions. High strength-to-modulus ratio β Ti alloys together with excellent biological response show their prospect for biomedical applications.",

keywords = "Equiaxed microstructure, In-situ alloying, Static immersion testing, Strength-to-modulus ratio, Ti-Nb-Ta based β alloys, Zirconium addition",

author = "Weihuan Kong and Cox, {Sophie C.} and Yu Lu and Victor Villapun and Xiaoling Xiao and Wenyou Ma and Min Liu and Attallah, {Moataz M.}",

note = "Funding Information: WK acknowledges the financial support for the TEM characterization work provided by Institute of New Materials, Guangdong Academy of Sciences (PI: MMA, grant: 17-0551 ), as well as the chemical analysis from School of Geography, Earth and Environmental Sciences, University of Birmingham . Publisher Copyright: {\textcopyright} 2021",

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AU - Villapun, Victor

AU - Xiao, Xiaoling

AU - Ma, Wenyou

AU - Liu, Min

AU - Attallah, Moataz M.

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AB - This study investigates Ti-Nb-Ta based β alloys with different zirconium additions (0, 5, 9 wt%) manufactured by SLM. A low level of as-fabricated defects is obtained: the relative density of TNT (Z) alloys is >99.97% with the keyhole size in a range of 3–20 μm. BF TEM images combining SAD patterns of TNT(Z) alloys show single β phase obtained inside the beta matrix; BF-STEM images reveal potential nano-scale grain boundary alpha phase precipitation. Zirconium functions as a neutral element in these high β-stabilized Ti-Nb-Ta based alloys. An increase in Vickers hardness and UTS caused by zirconium additions is observed, which is explained by beta grain refinement because higher degree of undercooling occurs. Corrosion ions of TNT(Z) alloys released from immersion testing at each time intervals show extremely small concentrations (<10 μg/L). It indicated that good biocompatibility during culture with the negligible corrosion ions. High strength-to-modulus ratio β Ti alloys together with excellent biological response show their prospect for biomedical applications.

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The influence of zirconium content on the microstructure, mechanical properties, and biocompatibility of in-situ alloying Ti-Nb-Ta based β alloys processed by selective laser melting

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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