TY - GEN
T1 - Endurance of low-modulus β-type titanium alloys for spinal fixation
AU - Niinomi, Mitsuo
AU - Nakai, Masaaki
AU - Hieda, Junko
AU - Cho, Ken
AU - Narita, Kengo
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - Newly developed low-modulus β-type titanium alloys such as Ti-29Nb-13Ta-4.6Zr (TNTZ) and Ti-Cr alloys are expected to be used for rods in spinal fixation devices. As the endurance, i.e., fatigue strength, is one of the most important factors for this application. Various types of fatigue strengths of TNTZ and Ti-Cr alloys as well as their developments were investigated. Compared to conventional Ti-6A1-4V extra low interstitials (ELI) for biomedical applications the uni-axial fatigue strength of TNTZ is increased significantly by thermomechanical processing, which includes solution treatment, severe cold swaging or rolling, and followed by aging treatment. The uni-axial fatigue strength of Ti-12Cr is significantly higher compared to that of Ti-6A1-4V ELI. The four point bending fatigue strengths of the alloys exhibit opposite trends.
AB - Newly developed low-modulus β-type titanium alloys such as Ti-29Nb-13Ta-4.6Zr (TNTZ) and Ti-Cr alloys are expected to be used for rods in spinal fixation devices. As the endurance, i.e., fatigue strength, is one of the most important factors for this application. Various types of fatigue strengths of TNTZ and Ti-Cr alloys as well as their developments were investigated. Compared to conventional Ti-6A1-4V extra low interstitials (ELI) for biomedical applications the uni-axial fatigue strength of TNTZ is increased significantly by thermomechanical processing, which includes solution treatment, severe cold swaging or rolling, and followed by aging treatment. The uni-axial fatigue strength of Ti-12Cr is significantly higher compared to that of Ti-6A1-4V ELI. The four point bending fatigue strengths of the alloys exhibit opposite trends.
KW - Biomaterials
KW - Fatigue strength
KW - Low-modulus
KW - Microstructure
KW - Spinal fixation
KW - β-type titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=84899707726&partnerID=8YFLogxK
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U2 - 10.1002/9781118889879.ch27
DO - 10.1002/9781118889879.ch27
M3 - Conference contribution
AN - SCOPUS:84899707726
SN - 9781118889725
T3 - TMS Annual Meeting
SP - 205
EP - 212
BT - TMS 2014 - 143rd Annual Meeting and Exhibition, Supplemental Proceedings
PB - Minerals, Metals and Materials Society
T2 - 143rd Annual Meeting and Exhibition, TMS 2014
Y2 - 16 February 2014 through 20 February 2014
ER -