Relationship between heterogeneous microstructure and fatigue strength of Ti-Nb-Ta-Zr alloy for biomedical materials subjected to aging treatments

Kengo Narita, Mitsuo Niinomi, Masaaki Nakai

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

Abstract

β-type titanium alloys such as a Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) are potential candidates for next-generation metallic biomaterials. However, the mechanical strength of b-type titanium alloys with a single b phase is not enough to be approved as materials for fabricating medical implant devices that are subjected to heavy loads, such as a spinal fixation device. Therefore, β-type titanium alloys are often subjected to aging treatments in order to improve their mechanical strength through precipitation hardening. However, β-type titanium alloys exhibit a heterogeneous microstructure because of microscale elemental segregation. In this study, the heterogeneous microstructure caused by the microsegregation of secondary phases was characterized by field emission scanning electron microscopy (FESEM) in TNTZ subjected to aging treatments. Furthermore, the influence of the heterogeneous distribution of secondary phases in TNTZ on mechanical properties was revealed by comparing its properties to the homogeneously structured TNTZ subjected to long-term homogenization.

Original languageEnglish
Title of host publicationTHERMEC 2013
EditorsB. Mishra, Mihail. Ionescu, T. Chandra
PublisherTrans Tech Publications Ltd
Pages1313-1319
Number of pages7
ISBN (Print)9783038350736
DOIs
Publication statusPublished - 2014 Jan 1
Event8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013 - Las Vegas, NV, United States
Duration: 2013 Dec 22013 Dec 6

Publication series

NameMaterials Science Forum
Volume783-786
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013
CountryUnited States
CityLas Vegas, NV
Period13/12/213/12/6

Keywords

  • Aging treatment
  • Biomaterials
  • Fatigue strength
  • β-type titanium alloy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Narita, K., Niinomi, M., & Nakai, M. (2014). Relationship between heterogeneous microstructure and fatigue strength of Ti-Nb-Ta-Zr alloy for biomedical materials subjected to aging treatments. In B. Mishra, M. Ionescu, & T. Chandra (Eds.), THERMEC 2013 (pp. 1313-1319). (Materials Science Forum; Vol. 783-786). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/msf.783-786.1313