Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/142201
Title: Improvement on mechanical properties and corrosion resistance of titanium-tantalum alloys in-situ fabricated via selective laser melting
Authors: Zhao, Danlei
Han, Changjun
Li, Yan
Li, Jingjing
Zhou, Kun
Wei, Qingsong
Liu, Jie
Shi, Yusheng
Keywords: Engineering::Materials::Metallic materials::Alloys
Issue Date: 2019
Source: Zhao, D., Han, C., Li, Y., Li, J., Zhou, K., Wei, Q., . . . Shi, Y. (2019). Improvement on mechanical properties and corrosion resistance of titanium-tantalum alloys in-situ fabricated via selective laser melting. Journal of Alloys and Compounds, 804, 288-298. doi:10.1016/j.jallcom.2019.06.307
Journal: Journal of Alloys and Compounds
Abstract: In this study, the role of tantalum (Ta) on the phase transformation, microstructure evolution, mechanical properties and corrosion resistance of titanium-tantalum (Ti–Ta) alloys in-situ fabricated via selective laser melting (SLM) was investigated. Ti–Ta mixed powders with different Ta ratios ranging from 0 to 25 wt % were prepared by ball milling for the SLM process. With the increase of Ta content, the SLM-processed Ti–Ta alloys exhibits the microstructure evolution from the lath α grain to acicular α' + primary cellular β grains, accompanying with the gradual suppression of martensite transformation. The β-stabilized effect of Ta promotes the formation of β (Ti, Ta) solid solution phase in the alloys. The rise of Ta addition in SLM-processed Ti–Ta alloys contributes to the improvement on the tensile strength from 641 to 1186 MPa and the microhardness from 257 to 353 HV, which results from a combined effect of grain refinement strengthening and the solid solution strengthening. The Young's modulus decreases from 115 to 89 GPa due to the increasing amount of β phase. Additionally, the corrosion resistance of the Ti–Ta alloys is enhanced with few pits on the surfaces due to the increasing amount of Ta2O5 identified through X-ray photoelectron spectroscopy. These findings provide the knowledge and boost the further understanding on the SLM-processed Ti–Ta alloys as promising candidates for biomedical application.
URI: https://hdl.handle.net/10356/142201
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2019.06.307
Rights: © 2019 Elsevier B.V. All rights reserved. This paper was published in Journal of Alloys and Compounds and is made available with permission of Elsevier B.V.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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