Enhancing the durability of spinal implant fixture applications made of Ti-6Al-4V ELI by means of cavitation peening

Osamu Takakuwa, Masaaki Nakai, Kengo Narita, Mitsuo Niinomi, Kazuhiro Hasegawa, Hitoshi Soyama

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The surface treatment technology known as ‘cavitation peening’ was employed in this study in order to enhance the durability of spinal implant fixture applications, which are subject to fretting fatigue. Cavitation peening can be realized by a technique in which a high-speed water jet is injected into water through a nozzle. It utilizes a phenomenon by which surface impacts due to collapsing cavitation bubbles induce work-hardening by introducing residual compressive stress near the surface. A fretting fatigue test was conducted on a spinal implant rod made of Ti-6Al-4V ELI in accordance with the ASTM F1717 standard, which is the established method for testing spinal implants after they are treated by cavitation peening. The residual stress was evaluated by using X-ray diffraction analysis. The hardness over the cross-sectional area was also measured using an indentation test. The obtained results show that cavitation peening drastically improves the fretting fatigue properties of spinal implant fixtures by as much as 2.2 times compared to untreated ones. This can be attributed to a significant increase in the hardness from 5.0 to 9.6 GPa and a high compressive residual stress of over 600 MPa induced by cavitation peening.

Original languageEnglish
Pages (from-to)360-367
Number of pages8
JournalInternational Journal of Fatigue
Volume92
DOIs
Publication statusPublished - Nov 1 2016
Externally publishedYes

Fingerprint

Shot peening
Implant
Cavitation
Durability
Fretting Fatigue
Residual stresses
Fatigue of materials
Residual Stress
Compressive stress
Hardness
Water
Surface Treatment
Indentation
Collapsing
Nozzle
Hardening
Bubbles (in fluids)
Strain hardening
X-ray Diffraction
X ray diffraction analysis

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this

Enhancing the durability of spinal implant fixture applications made of Ti-6Al-4V ELI by means of cavitation peening. / Takakuwa, Osamu; Nakai, Masaaki; Narita, Kengo; Niinomi, Mitsuo; Hasegawa, Kazuhiro; Soyama, Hitoshi.

In: International Journal of Fatigue, Vol. 92, 01.11.2016, p. 360-367.

Research output: Contribution to journalArticle

Takakuwa, Osamu ; Nakai, Masaaki ; Narita, Kengo ; Niinomi, Mitsuo ; Hasegawa, Kazuhiro ; Soyama, Hitoshi. / Enhancing the durability of spinal implant fixture applications made of Ti-6Al-4V ELI by means of cavitation peening. In: International Journal of Fatigue. 2016 ; Vol. 92. pp. 360-367.
@article{fe90fdf575d149cd96e36a702c242d16,
title = "Enhancing the durability of spinal implant fixture applications made of Ti-6Al-4V ELI by means of cavitation peening",
abstract = "The surface treatment technology known as ‘cavitation peening’ was employed in this study in order to enhance the durability of spinal implant fixture applications, which are subject to fretting fatigue. Cavitation peening can be realized by a technique in which a high-speed water jet is injected into water through a nozzle. It utilizes a phenomenon by which surface impacts due to collapsing cavitation bubbles induce work-hardening by introducing residual compressive stress near the surface. A fretting fatigue test was conducted on a spinal implant rod made of Ti-6Al-4V ELI in accordance with the ASTM F1717 standard, which is the established method for testing spinal implants after they are treated by cavitation peening. The residual stress was evaluated by using X-ray diffraction analysis. The hardness over the cross-sectional area was also measured using an indentation test. The obtained results show that cavitation peening drastically improves the fretting fatigue properties of spinal implant fixtures by as much as 2.2 times compared to untreated ones. This can be attributed to a significant increase in the hardness from 5.0 to 9.6 GPa and a high compressive residual stress of over 600 MPa induced by cavitation peening.",
author = "Osamu Takakuwa and Masaaki Nakai and Kengo Narita and Mitsuo Niinomi and Kazuhiro Hasegawa and Hitoshi Soyama",
year = "2016",
month = "11",
day = "1",
doi = "10.1016/j.ijfatigue.2016.07.021",
language = "English",
volume = "92",
pages = "360--367",
journal = "International Journal of Fatigue",
issn = "0142-1123",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Enhancing the durability of spinal implant fixture applications made of Ti-6Al-4V ELI by means of cavitation peening

AU - Takakuwa, Osamu

AU - Nakai, Masaaki

AU - Narita, Kengo

AU - Niinomi, Mitsuo

AU - Hasegawa, Kazuhiro

AU - Soyama, Hitoshi

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The surface treatment technology known as ‘cavitation peening’ was employed in this study in order to enhance the durability of spinal implant fixture applications, which are subject to fretting fatigue. Cavitation peening can be realized by a technique in which a high-speed water jet is injected into water through a nozzle. It utilizes a phenomenon by which surface impacts due to collapsing cavitation bubbles induce work-hardening by introducing residual compressive stress near the surface. A fretting fatigue test was conducted on a spinal implant rod made of Ti-6Al-4V ELI in accordance with the ASTM F1717 standard, which is the established method for testing spinal implants after they are treated by cavitation peening. The residual stress was evaluated by using X-ray diffraction analysis. The hardness over the cross-sectional area was also measured using an indentation test. The obtained results show that cavitation peening drastically improves the fretting fatigue properties of spinal implant fixtures by as much as 2.2 times compared to untreated ones. This can be attributed to a significant increase in the hardness from 5.0 to 9.6 GPa and a high compressive residual stress of over 600 MPa induced by cavitation peening.

AB - The surface treatment technology known as ‘cavitation peening’ was employed in this study in order to enhance the durability of spinal implant fixture applications, which are subject to fretting fatigue. Cavitation peening can be realized by a technique in which a high-speed water jet is injected into water through a nozzle. It utilizes a phenomenon by which surface impacts due to collapsing cavitation bubbles induce work-hardening by introducing residual compressive stress near the surface. A fretting fatigue test was conducted on a spinal implant rod made of Ti-6Al-4V ELI in accordance with the ASTM F1717 standard, which is the established method for testing spinal implants after they are treated by cavitation peening. The residual stress was evaluated by using X-ray diffraction analysis. The hardness over the cross-sectional area was also measured using an indentation test. The obtained results show that cavitation peening drastically improves the fretting fatigue properties of spinal implant fixtures by as much as 2.2 times compared to untreated ones. This can be attributed to a significant increase in the hardness from 5.0 to 9.6 GPa and a high compressive residual stress of over 600 MPa induced by cavitation peening.

UR - http://www.scopus.com/inward/record.url?scp=84982746863&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84982746863&partnerID=8YFLogxK

U2 - 10.1016/j.ijfatigue.2016.07.021

DO - 10.1016/j.ijfatigue.2016.07.021

M3 - Article

AN - SCOPUS:84982746863

VL - 92

SP - 360

EP - 367

JO - International Journal of Fatigue

JF - International Journal of Fatigue

SN - 0142-1123

ER -