Young’s Modulus Changeable Titanium Alloys for Orthopaedic Applications

Masaaki Nakai; Mitsuo Niinomi; Xiao Li Zhao; Xing Feng Zhao

doi:10.4028/www.scientific.net/MSF.706-709.557

Paper Titles

Osteoconductive TiO₂ Coating on Titanium Using Anodizing in High Content Phosphoric Acid
p.538

Quantitative Analysis of the Cellular Actin Cytoskeleton on Geometrically Designed Surface Topography
p.543

Control of Osteoblastic Cell Behavior by Surface Topography Introduced by Plastic Deformation of Ti Single Crystal with h.c.p. Structure
p.549

Mechanical Properties of Ti-Cr-Sn-Zr Alloys with Low Young’s Modulus
p.553

Young’s Modulus Changeable Titanium Alloys for Orthopaedic Applications
p.557

Single Crystal Growth and its Microstructure in Co-Cr-Mo Alloys for Biomedical Applications
p.561

Osteoblast Behavior In Vitro in Porous Calcium Phosphate Composite Scaffolds, Surface Activated with a Cell Adhesive Plasma Polymer Layer
p.566

Collagen-Silk Fibroin Fibers: A Promising Scaffold for Vascular Tissue Engineering
p.572

High Performance Beta Titanium Alloys as a New Material Perspective for Cardiovascular Applications
p.578

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Young’s Modulus Changeable Titanium Alloys for Orthopaedic Applications

Abstract:

A novel biomedical titanium alloy with the ability to undergo self-adjustment in its Young’s modulus was developed. In spinal fixation devices, the Young’s modulus of the metallic implant rod should be sufficiently high to suppress springback for the surgeon, but should also be sufficiently low to prevent stress shielding for the patient. Therefore, deformation-induced ω phase transformation was introduced into β-type titanium alloys so that the Young’s modulus of only the deformed part would increase during operation, while that of the non-deformed part would remain low. The increase in the Young’s modulus due to cold rolling was investigated for a binary Ti-12Cr alloy (mass%). Microstructural observation and Young’s modulus measurement reveal that the Ti-12Cr alloy undergoes deformation-induced ω phase transformation and exhibits the increase in the Young’s modulus by deformation.