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Development of Ti–Nb–Zr alloys with high elastic admissible strain for temporary orthopedic devices

Paper ID Volume ID Publish Year Pages File Format Full-Text
284 22 2015 12 PDF Available
Title
Development of Ti–Nb–Zr alloys with high elastic admissible strain for temporary orthopedic devices
Abstract

A new series of beta Ti–Nb–Zr (TNZ) alloys with considerable plastic deformation ability during compression test, high elastic admissible strain, and excellent cytocompatibility have been developed for removable bone tissue implant applications. TNZ alloys with nominal compositions of Ti–34Nb–25Zr, Ti–30Nb–32Zr, Ti–28Nb–35.4Zr and Ti–24.8Nb–40.7Zr (wt.% hereafter) were fabricated using the cold-crucible levitation technique, and the effects of alloying element content on their microstructures, mechanical properties (tensile strength, yield strength, compressive yield strength, Young’s modulus, elastic energy, toughness, and micro-hardness), and cytocompatibilities were investigated and compared. Microstructural examinations revealed that the TNZ alloys consisted of β phase. The alloy samples displayed excellent ductility with no cracking, or fracturing during compression tests. Their tensile strength, Young’s modulus, elongation at rupture, and elastic admissible strain were measured in the ranges of 704–839 MPa, 62–65 GPa, 9.9–14.8% and 1.08–1.31%, respectively. The tensile strength, Young’s modulus and elongation at rupture of the Ti–34Nb–25Zr alloy were measured as 839 ± 31.8 MPa, 62 ± 3.6 GPa, and 14.8 ± 1.6%, respectively; this alloy exhibited the elastic admissible strain of approximately 1.31%. Cytocompatibility tests indicated that the cell viability ratios (CVR) of the alloys are greater than those of the control group; thus the TNZ alloys possess excellent cytocompatibility.

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Keywords
Elastic admissible strain; Cytocompatibility; TNZ (Ti–Nb–Zr) alloys; Mechanical properties; Young’s modulus
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Development of Ti–Nb–Zr alloys with high elastic admissible strain for temporary orthopedic devices
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 20, 1 July 2015, Pages 176–187
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us