Enhanced oxidation resistance of a titanium–based alloy by the addition of boron and the application of electron beam melting

Yujie Cui; Kenta Aoyagi; Yuichiro Koizumi; Tadashi Fujieda; Akihiko Chiba

doi:10.1016/j.addma.2019.100971

Enhanced oxidation resistance of a titanium–based alloy by the addition of boron and the application of electron beam melting

Yujie Cui, Kenta Aoyagi, Yuichiro Koizumi, Tadashi Fujieda, Akihiko Chiba

Materials Processing and Characterization Division

Research output: Contribution to journal › Article

Abstract

Refined TiB precipitates significantly enhance the oxidation resistance of Ti-6Al-2Sn-4Zr-2Mo-0.1Si-1.0B alloy fabricated by electron beam powder bed fusion (EB-PBF). Refined TiB precipitates in the EB-PBF-built alloy enable finer oxide formation than the larger precipitates in the forged alloy, and the resulting oxidation layers are more compact. Evaporation of scattered B₂O₃ generated by the refined TiB precipitates in the EB-PBF-built alloy do not significantly accelerate detachment of the oxidation layer from the substrate. However, collective evaporation of B₂O₃ generated by larger TiB precipitates in the forged alloy accelerate detachment. The oxidation layer on the EB-PBF-fabricated alloy was more stable, preventing further oxidation and improving oxidation resistance.

Original language	English
Article number	100971
Journal	Additive Manufacturing
Volume	31
DOIs	https://doi.org/10.1016/j.addma.2019.100971
Publication status	Published - 2020 Jan

Keywords

Electron beam powder bed fusion
Oxidation
Precipitates
Titanium alloys

ASJC Scopus subject areas

Biomedical Engineering
Materials Science(all)
Engineering (miscellaneous)
Industrial and Manufacturing Engineering

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Cui, Y., Aoyagi, K., Koizumi, Y., Fujieda, T., & Chiba, A. (2020). Enhanced oxidation resistance of a titanium–based alloy by the addition of boron and the application of electron beam melting. Additive Manufacturing, 31, [100971]. https://doi.org/10.1016/j.addma.2019.100971

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title = "Enhanced oxidation resistance of a titanium–based alloy by the addition of boron and the application of electron beam melting",

abstract = "Refined TiB precipitates significantly enhance the oxidation resistance of Ti-6Al-2Sn-4Zr-2Mo-0.1Si-1.0B alloy fabricated by electron beam powder bed fusion (EB-PBF). Refined TiB precipitates in the EB-PBF-built alloy enable finer oxide formation than the larger precipitates in the forged alloy, and the resulting oxidation layers are more compact. Evaporation of scattered B2O3 generated by the refined TiB precipitates in the EB-PBF-built alloy do not significantly accelerate detachment of the oxidation layer from the substrate. However, collective evaporation of B2O3 generated by larger TiB precipitates in the forged alloy accelerate detachment. The oxidation layer on the EB-PBF-fabricated alloy was more stable, preventing further oxidation and improving oxidation resistance.",

keywords = "Electron beam powder bed fusion, Oxidation, Precipitates, Titanium alloys",

author = "Yujie Cui and Kenta Aoyagi and Yuichiro Koizumi and Tadashi Fujieda and Akihiko Chiba",

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AU - Cui, Yujie

AU - Aoyagi, Kenta

AU - Koizumi, Yuichiro

AU - Fujieda, Tadashi

AU - Chiba, Akihiko

PY - 2020/1

Y1 - 2020/1

N2 - Refined TiB precipitates significantly enhance the oxidation resistance of Ti-6Al-2Sn-4Zr-2Mo-0.1Si-1.0B alloy fabricated by electron beam powder bed fusion (EB-PBF). Refined TiB precipitates in the EB-PBF-built alloy enable finer oxide formation than the larger precipitates in the forged alloy, and the resulting oxidation layers are more compact. Evaporation of scattered B2O3 generated by the refined TiB precipitates in the EB-PBF-built alloy do not significantly accelerate detachment of the oxidation layer from the substrate. However, collective evaporation of B2O3 generated by larger TiB precipitates in the forged alloy accelerate detachment. The oxidation layer on the EB-PBF-fabricated alloy was more stable, preventing further oxidation and improving oxidation resistance.

AB - Refined TiB precipitates significantly enhance the oxidation resistance of Ti-6Al-2Sn-4Zr-2Mo-0.1Si-1.0B alloy fabricated by electron beam powder bed fusion (EB-PBF). Refined TiB precipitates in the EB-PBF-built alloy enable finer oxide formation than the larger precipitates in the forged alloy, and the resulting oxidation layers are more compact. Evaporation of scattered B2O3 generated by the refined TiB precipitates in the EB-PBF-built alloy do not significantly accelerate detachment of the oxidation layer from the substrate. However, collective evaporation of B2O3 generated by larger TiB precipitates in the forged alloy accelerate detachment. The oxidation layer on the EB-PBF-fabricated alloy was more stable, preventing further oxidation and improving oxidation resistance.

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KW - Oxidation

KW - Precipitates

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