Fatigue characteristics of low cost β titanium alloys for healthcare and medical applications

Gunawarman, Mitsuo Niinomi, Toshikazu Akahori, Takayuki Souma, Masahiko Ikeda, Hiroyuki Toda, Kazuhiko Terashima

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Two new low cost β titanium alloys, Ti-4.3Fe-7.1Cr (TFC alloy) and Ti-4.3Fe-7.1Cr-3.0Al (TFCA alloy) for healthcare and medical applications have been recently developed. As for such applications, the alloys are necessary to have high fatigue performance. The aim of this study is, therefore, to investigate fatigue characteristics of the alloys subjected to solution treatment above β transus. Fatigue tests were carried out at a stress ratio, R, of 0.1 and a frequency of 10 Hz. Fatigue limit of the solution treated TFC alloy is higher than that of the solution treated TFCA alloy, but both are higher than that of the existing biometallic materials. Fatigue strength of the TFC alloy is almost independent of solution treatment temperature, while, fatigue strength of the TFCA alloy strongly depends on solution treatment temperature, especially, in the low cycle fatigue life (LCF) region. The fatigue ratio and biofunctionality of these new alloys are much higher than those of the existing biometallic materials. In general, a crack initiates from the surface in the LCF region and from subsurface (internal) in the high cycle fatigue life (HCF) region for the TFC alloy, while, in the case of the TFCA alloy, a crack tends to initiate from the subsurface in both LCF and HCF regions. The internal crack initiation sites are found to be the area with low β phase stability in the LCF region and at the area with high stability of β phase in the HCF region. The relatively low fatigue strength of TFCA alloy is associated with the addition of Al that leads to precipitate α phase in which both crack initiation and facet formation are easier to occur.

Original languageEnglish
Pages (from-to)1570-1577
Number of pages8
JournalMaterials Transactions
Volume46
Issue number7
DOIs
Publication statusPublished - Jul 1 2005
Externally publishedYes

Fingerprint

titanium alloys
Medical applications
Titanium alloys
Fatigue of materials
fatigue life
Costs
cycles
crack initiation
Crack initiation
cracks
stress ratio
Cracks
Phase stability
fatigue tests
Precipitates
flat surfaces
precipitates

All Science Journal Classification (ASJC) codes

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

Cite this

Fatigue characteristics of low cost β titanium alloys for healthcare and medical applications. / Gunawarman; Niinomi, Mitsuo; Akahori, Toshikazu; Souma, Takayuki; Ikeda, Masahiko; Toda, Hiroyuki; Terashima, Kazuhiko.

In: Materials Transactions, Vol. 46, No. 7, 01.07.2005, p. 1570-1577.

Research output: Contribution to journalArticle

Gunawarman, Niinomi, M, Akahori, T, Souma, T, Ikeda, M, Toda, H & Terashima, K 2005, 'Fatigue characteristics of low cost β titanium alloys for healthcare and medical applications', Materials Transactions, vol. 46, no. 7, pp. 1570-1577. https://doi.org/10.2320/matertrans.46.1570
Gunawarman ; Niinomi, Mitsuo ; Akahori, Toshikazu ; Souma, Takayuki ; Ikeda, Masahiko ; Toda, Hiroyuki ; Terashima, Kazuhiko. / Fatigue characteristics of low cost β titanium alloys for healthcare and medical applications. In: Materials Transactions. 2005 ; Vol. 46, No. 7. pp. 1570-1577.
@article{9668ad0f1bdd414bbb4861d3c15b19fb,
title = "Fatigue characteristics of low cost β titanium alloys for healthcare and medical applications",
abstract = "Two new low cost β titanium alloys, Ti-4.3Fe-7.1Cr (TFC alloy) and Ti-4.3Fe-7.1Cr-3.0Al (TFCA alloy) for healthcare and medical applications have been recently developed. As for such applications, the alloys are necessary to have high fatigue performance. The aim of this study is, therefore, to investigate fatigue characteristics of the alloys subjected to solution treatment above β transus. Fatigue tests were carried out at a stress ratio, R, of 0.1 and a frequency of 10 Hz. Fatigue limit of the solution treated TFC alloy is higher than that of the solution treated TFCA alloy, but both are higher than that of the existing biometallic materials. Fatigue strength of the TFC alloy is almost independent of solution treatment temperature, while, fatigue strength of the TFCA alloy strongly depends on solution treatment temperature, especially, in the low cycle fatigue life (LCF) region. The fatigue ratio and biofunctionality of these new alloys are much higher than those of the existing biometallic materials. In general, a crack initiates from the surface in the LCF region and from subsurface (internal) in the high cycle fatigue life (HCF) region for the TFC alloy, while, in the case of the TFCA alloy, a crack tends to initiate from the subsurface in both LCF and HCF regions. The internal crack initiation sites are found to be the area with low β phase stability in the LCF region and at the area with high stability of β phase in the HCF region. The relatively low fatigue strength of TFCA alloy is associated with the addition of Al that leads to precipitate α phase in which both crack initiation and facet formation are easier to occur.",
author = "Gunawarman and Mitsuo Niinomi and Toshikazu Akahori and Takayuki Souma and Masahiko Ikeda and Hiroyuki Toda and Kazuhiko Terashima",
year = "2005",
month = "7",
day = "1",
doi = "10.2320/matertrans.46.1570",
language = "English",
volume = "46",
pages = "1570--1577",
journal = "Materials Transactions",
issn = "0916-1821",
publisher = "The Japan Institute of Metals and Materials",
number = "7",

}

TY - JOUR

T1 - Fatigue characteristics of low cost β titanium alloys for healthcare and medical applications

AU - Gunawarman,

AU - Niinomi, Mitsuo

AU - Akahori, Toshikazu

AU - Souma, Takayuki

AU - Ikeda, Masahiko

AU - Toda, Hiroyuki

AU - Terashima, Kazuhiko

PY - 2005/7/1

Y1 - 2005/7/1

N2 - Two new low cost β titanium alloys, Ti-4.3Fe-7.1Cr (TFC alloy) and Ti-4.3Fe-7.1Cr-3.0Al (TFCA alloy) for healthcare and medical applications have been recently developed. As for such applications, the alloys are necessary to have high fatigue performance. The aim of this study is, therefore, to investigate fatigue characteristics of the alloys subjected to solution treatment above β transus. Fatigue tests were carried out at a stress ratio, R, of 0.1 and a frequency of 10 Hz. Fatigue limit of the solution treated TFC alloy is higher than that of the solution treated TFCA alloy, but both are higher than that of the existing biometallic materials. Fatigue strength of the TFC alloy is almost independent of solution treatment temperature, while, fatigue strength of the TFCA alloy strongly depends on solution treatment temperature, especially, in the low cycle fatigue life (LCF) region. The fatigue ratio and biofunctionality of these new alloys are much higher than those of the existing biometallic materials. In general, a crack initiates from the surface in the LCF region and from subsurface (internal) in the high cycle fatigue life (HCF) region for the TFC alloy, while, in the case of the TFCA alloy, a crack tends to initiate from the subsurface in both LCF and HCF regions. The internal crack initiation sites are found to be the area with low β phase stability in the LCF region and at the area with high stability of β phase in the HCF region. The relatively low fatigue strength of TFCA alloy is associated with the addition of Al that leads to precipitate α phase in which both crack initiation and facet formation are easier to occur.

AB - Two new low cost β titanium alloys, Ti-4.3Fe-7.1Cr (TFC alloy) and Ti-4.3Fe-7.1Cr-3.0Al (TFCA alloy) for healthcare and medical applications have been recently developed. As for such applications, the alloys are necessary to have high fatigue performance. The aim of this study is, therefore, to investigate fatigue characteristics of the alloys subjected to solution treatment above β transus. Fatigue tests were carried out at a stress ratio, R, of 0.1 and a frequency of 10 Hz. Fatigue limit of the solution treated TFC alloy is higher than that of the solution treated TFCA alloy, but both are higher than that of the existing biometallic materials. Fatigue strength of the TFC alloy is almost independent of solution treatment temperature, while, fatigue strength of the TFCA alloy strongly depends on solution treatment temperature, especially, in the low cycle fatigue life (LCF) region. The fatigue ratio and biofunctionality of these new alloys are much higher than those of the existing biometallic materials. In general, a crack initiates from the surface in the LCF region and from subsurface (internal) in the high cycle fatigue life (HCF) region for the TFC alloy, while, in the case of the TFCA alloy, a crack tends to initiate from the subsurface in both LCF and HCF regions. The internal crack initiation sites are found to be the area with low β phase stability in the LCF region and at the area with high stability of β phase in the HCF region. The relatively low fatigue strength of TFCA alloy is associated with the addition of Al that leads to precipitate α phase in which both crack initiation and facet formation are easier to occur.

UR - http://www.scopus.com/inward/record.url?scp=24944575175&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=24944575175&partnerID=8YFLogxK

U2 - 10.2320/matertrans.46.1570

DO - 10.2320/matertrans.46.1570

M3 - Article

AN - SCOPUS:24944575175

VL - 46

SP - 1570

EP - 1577

JO - Materials Transactions

JF - Materials Transactions

SN - 0916-1821

IS - 7

ER -