Additive manufacturing of the high-strength and low modulus biomedical Ti-10 Nb alloy under reactive atmosphere

Zhang，J. W.1; Dong，Y. P.1; Tang，J. C.1; Wang，D. W.1; Lu，W. J.2; Li，Y. L.3; Wang，D. Y.4; Okulov，I.5,6; Yan，M.1,7

2022-12-01

10.1016/j.mtcomm.2022.104837

Materials Today Communications   Impact Factor & Quartile

2352-4928

In situ enhancement of alloy properties via additive manufacturing is a convenient and promising approach that is attracting increasing attention. Herein, we overcame the insufficient strength of Ti-10 Nb alloy used in orthopedic implants by introducing an Ar + N reactive atmosphere during selective laser melting. The mechanical properties, phase compositions, microstructures, and biocompatibility of the Ti-10 Nb alloys formed under the reactive atmospheres containing 3 vol% and 5 vol% N were investigated. Scanning electron microscope, electron backscatter diffraction, and transmission electron microscope were employed to investigate the mechanism of N on the mechanical property evolution of Ti-10 Nb. The biocompatibility of the Ti-10 Nb alloys fabricated under different N concentrations was investigated using in vitro cell proliferation and adhesion assays, with pure Ti used as a reference. The Ti-10 Nb alloy displayed a tensile strength of 855 MPa, yield strength of 763 MPa, an elongation of 21.6%, and elastic modulus of 72 GPa when the N fraction was 3 vol%. The as-printed Ti-10 Nb alloy exhibited good biocompatibility, and the introduction of N promoted the proliferation of MG-63 cells. This study paves the way for the synthesis of high-strength and low modulus biomedical Ti alloys by reactive additive manufacturing.

Additive manufacturing Biocompatibility Mechanical properties Near-β-type titanium Selective laser melting

SCI

English

First ; Corresponding

Basic and Applied Basic Research Foundation of Guangdong Province[2020B1515120013];National Natural Science Foundation of China[51971108];National Natural Science Foundation of China[52171036];Science, Technology and Innovation Commission of Shenzhen Municipality[JCYJ20180504165824643];

Materials Science

Materials Science, Multidisciplinary

WOS:000892570500006

ELSEVIER

2-s2.0-85142132603

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Key Lab for Robot &Welding Automation of Jiangxi Province,Mechanical and Electrical Engineering School,Nanchang University,Nanchang,330031,China
4.Stomatological Center,Peking University Shenzhen Hospital,Shenzhen,518034,China
5.Faculty of Production Engineering,University of Bremen,Bremen,Badgasteiner Str. 1,28359,Germany
6.Leibniz Institute for Materials Engineering - IWT,Bremen,Badgasteiner Str. 3,28359,Germany
7.Jiaxing Research Institute,Southern University of Science and Technology,Jiaxing,314031,China

Zhang，J. W.,Dong，Y. P.,Tang，J. C.,et al. Additive manufacturing of the high-strength and low modulus biomedical Ti-10 Nb alloy under reactive atmosphere[J]. Materials Today Communications,2022,33.

Zhang，J. W..,Dong，Y. P..,Tang，J. C..,Wang，D. W..,Lu，W. J..,...&Yan，M..(2022).Additive manufacturing of the high-strength and low modulus biomedical Ti-10 Nb alloy under reactive atmosphere.Materials Today Communications,33.

Zhang，J. W.,et al."Additive manufacturing of the high-strength and low modulus biomedical Ti-10 Nb alloy under reactive atmosphere".Materials Today Communications 33(2022).