Improvement in fatigue strength of Ti-29Nb-13Ta-4.6Zr alloy while maintaining low modulus for biomedical applications

Masaaki Nakai, Mitsuo Niinomi, T. Akahori, H. Tsutsumi, T. Oneda, M. Ogawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A thermomechanical process was optimized to improve fatigue strength while maintaining a low Young's modulus in a biomedical β-type titanium alloy, Ti-29mass%Nb-13mass%Ta-4.6mass%Zr (TNTZ) alloy. For this purpose, short-time aging combined with severe cold rolling was employed in this study. The TNTZ alloy was aged at 573 K for various time periods after cold rolling. As a result, the ω phase was observed in the TNTZ alloys subjected to the above-mentioned process. Among these TNTZ alloys, the samples aged for 3.6 ks and 10.8 ks showed a good balance between tensile strength and elongation. However, in the case of the 3.6 ks samples, the tensile strength was improved, but the fatigue strength was not improved remarkably. On the other hand, in the case of the 10.8 ks samples, the tensile strength and the fatigue strength were both improved by this process. This fatigue strength is the highest among the TNTZ alloys with a relatively low Young's modulus (below 80 GPa).

Original languageEnglish
Title of host publicationMedical Device Materials V - Proceedings of the Materials and Processes for Medical Devices Conference
Pages86-89
Number of pages4
Publication statusPublished - 2010 Aug 26
Event5th Materials and Processes for Medical Devices Conference, MPMD - Minneapolis, MN, United States
Duration: 2009 Aug 102009 Aug 12

Publication series

NameMedical Device Materials V - Proceedings of the Materials and Processes for Medical Devices Conference

Other

Other5th Materials and Processes for Medical Devices Conference, MPMD
CountryUnited States
CityMinneapolis, MN
Period09/8/1009/8/12

ASJC Scopus subject areas

  • Biomedical Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Improvement in fatigue strength of Ti-29Nb-13Ta-4.6Zr alloy while maintaining low modulus for biomedical applications'. Together they form a unique fingerprint.

Cite this