A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications

A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications

The metastable β-Ti21S alloy is evaluated as a potential candidate for biomedical parts. Near fully dense (99.75 ± 0.02%) samples are additively manufactured (that is, 3D-printed) by laser powder-bed fusion (L-PBF). In the as-built condition, the material consists of metastable β-phase only, with co...

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Main Authors: Massimo Pellizzari, Alireza Jam, Matilde Tschon, Milena Fini, Carlo Lora, Matteo Benedetti
Format: Article
Language:English
Published: MDPI AG 2020-06-01
Series:Materials
Subjects:
3D-printing
orthopaedic biomaterials
bone prosthesis
β-Titanium alloy
Young’s modulus
cytotoxicity
Online Access:https://www.mdpi.com/1996-1944/13/12/2792
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spelling doaj-37ab291587664cedb00c0033f7b216522020-11-25T02:28:12ZengMDPI AGMaterials1996-19442020-06-01132792279210.3390/ma13122792A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical ApplicationsMassimo Pellizzari0Alireza Jam1Matilde Tschon2Milena Fini3Carlo Lora4Matteo Benedetti5Department of Industrial Engineering, University of Trento, 38123 Trento, ItalyDepartment of Industrial Engineering, University of Trento, 38123 Trento, ItalyLaboratory of Preclinical and Surgical Studies, IRCCS-Istituto Ortopedico Rizzoli, 40136 Bologna, ItalyLaboratory of Preclinical and Surgical Studies, IRCCS-Istituto Ortopedico Rizzoli, 40136 Bologna, ItalySISMA Spa, 36013 Piovene Rocchette (VI), ItalyDepartment of Industrial Engineering, University of Trento, 38123 Trento, ItalyThe metastable β-Ti21S alloy is evaluated as a potential candidate for biomedical parts. Near fully dense (99.75 ± 0.02%) samples are additively manufactured (that is, 3D-printed) by laser powder-bed fusion (L-PBF). In the as-built condition, the material consists of metastable β-phase only, with columnar grains oriented along the building direction. The material exhibits an extremely low Young’s modulus (52 ± 0.3 GPa), which was never reported for this type of alloy. The combination of good mechanical strength (σ<sub>y0.2</sub> = 709 ± 6 MPa, ultimate tensile strength (UTS) = 831 ± 3 MPa) and high total elongation during tensile test (21% ± 1.2%) in the as-built state, that is, without any heat treatment, is close to that of the wrought alloy and comparable to that of heat treated Ti grade 5. The good biocompatibility attested by cytotoxicity tests confirms its great suitability for biomedical applications.https://www.mdpi.com/1996-1944/13/12/27923D-printingorthopaedic biomaterialsbone prosthesisβ-Titanium alloyYoung’s moduluscytotoxicity
collection DOAJ
language English
format Article
sources DOAJ
author Massimo Pellizzari
Alireza Jam
Matilde Tschon
Milena Fini
Carlo Lora
Matteo Benedetti
spellingShingle Massimo Pellizzari
Alireza Jam
Matilde Tschon
Milena Fini
Carlo Lora
Matteo Benedetti
A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications
Materials
3D-printing
orthopaedic biomaterials
bone prosthesis
β-Titanium alloy
Young’s modulus
cytotoxicity
author_facet Massimo Pellizzari
Alireza Jam
Matilde Tschon
Milena Fini
Carlo Lora
Matteo Benedetti
author_sort Massimo Pellizzari
title A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications
title_short A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications
title_full A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications
title_fullStr A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications
title_full_unstemmed A 3D-Printed Ultra-Low Young’s Modulus β-Ti Alloy for Biomedical Applications
title_sort 3d-printed ultra-low young’s modulus β-ti alloy for biomedical applications
publisher MDPI AG
series Materials
issn 1996-1944
publishDate 2020-06-01
description The metastable β-Ti21S alloy is evaluated as a potential candidate for biomedical parts. Near fully dense (99.75 ± 0.02%) samples are additively manufactured (that is, 3D-printed) by laser powder-bed fusion (L-PBF). In the as-built condition, the material consists of metastable β-phase only, with columnar grains oriented along the building direction. The material exhibits an extremely low Young’s modulus (52 ± 0.3 GPa), which was never reported for this type of alloy. The combination of good mechanical strength (σ<sub>y0.2</sub> = 709 ± 6 MPa, ultimate tensile strength (UTS) = 831 ± 3 MPa) and high total elongation during tensile test (21% ± 1.2%) in the as-built state, that is, without any heat treatment, is close to that of the wrought alloy and comparable to that of heat treated Ti grade 5. The good biocompatibility attested by cytotoxicity tests confirms its great suitability for biomedical applications.
topic 3D-printing
orthopaedic biomaterials
bone prosthesis
β-Titanium alloy
Young’s modulus
cytotoxicity
url https://www.mdpi.com/1996-1944/13/12/2792
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