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Optimization of Cr content of metastable β-type Ti–Cr alloys with changeable Young’s modulus for spinal fixation applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
728 60 2012 9 PDF Available
Title
Optimization of Cr content of metastable β-type Ti–Cr alloys with changeable Young’s modulus for spinal fixation applications
Abstract

Metallic implant rods used in spinal fixtures should have a Young’s modulus that is sufficiently low to prevent stress shielding for the patient and sufficiently high to suppress springback for the surgeon. Therefore, we propose a new concept: novel biomedical titanium alloys with a changeable Young’s modulus via deformation-induced ω phase transformation. In this study, the Cr content in the range of 10–14 mass% was optimized to produce deformation-induced ω phase transformation, resulting in a large increase in the Young’s modulus of binary Ti–Cr alloys. The springback and cytotoxicity of the optimized alloys were also examined. Ti–(10–12)Cr alloys exhibit an increase in Young’s modulus owing to deformation-induced ω phase transformation. In this case, such deformation-induced ω phase transformation occurs along with {3 3 2}β mechanical twinning, resulting in the maintenance of acceptable ductility with relatively high strength. Among the examined alloys, the lowest Young’s modulus and largest increase in Young’s modulus are obtained from the Ti–12Cr alloy. This alloy exhibits smaller springback than and comparable cytocompatibility to the biomedical Ti alloy Ti–29Nb–13Ta–4.6Zr.

Keywords
Biomaterials; β-type Ti–Cr alloys; Changeable Young’s modulus; Deformation-induced ω phase; Cytocompatibility
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Optimization of Cr content of metastable β-type Ti–Cr alloys with changeable Young’s modulus for spinal fixation applications
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 8, Issue 6, July 2012, Pages 2392–2400
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