Effect of surface treatments on fretting fatigue damage of biomedical titanium alloys

Vadiraj, Aravind; Kamaraj, M.

doi:10.1016/j.triboint.2006.02.064

Cited by 70 publications

(32 citation statements)

References 11 publications

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“…Surface modification by ion implantation techniques and application of hard coatings has shown significant improvement in the tribological properties of the Ti-6Al-4V and Co-Cr-Mo alloys. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Among various coating techniques; physical vapor deposition (PVD), chemical vapor deposition (CVD), and plasma spraying are widely used to form hard coatings on implant materials. PVD is one of the versatile techniques used in deposition of thin layer of titanium nitride, titanium carbide, or other metal oxide (vanadium-, yttrium-, zirconium-oxide) ceramic coatings for bearing surfaces.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of chromium oxide‐coated Ti‐6Al‐4V and Co‐Cr‐Mo alloy substrates

et al. 2011

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Hard coatings for articulating surfaces of total joint replacements may improve the overall wear resistance. However, any coating approach must take account of changes in corrosion behavior. This preliminary assessment analyzes the corrosion kinetics, impedance and mechanical-electrochemical stability of 100 μm thick plasma sprayed chromium oxide (Cr₂O₃) coatings on bearing surfaces in comparison to the native alloy oxide films on Co-Cr-Mo and Ti-6Al-6V. Cyclic potentiodynamic polarization, electrochemical impedance spectroscopy, and mechanical abrasion under potentiostatic conditions were performed on coated and substrate surfaces in physiological saline. SEM analysis characterized the coating morphology. The results showed that the corrosion current density values of chromium oxide coatings (0.4-1.2 μA/cm²) were of the same order of magnitude as Ti-6Al-4V alloy. Mechanical abrasion did not increase corrosion rates of chromium oxide coatings but did for uncoated Co-Cr-Mo and Ti-6Al-4V. The impedance response of chromium oxide coatings was very different than Co-Cr-Mo and Ti-6Al-4V native oxides characterized by a defected coating model. More of a frequency-independent purely resistive response was seen in mid-frequency range for the coatings (CPE(coat) : 40-280 nF/cm² (rad/s)(1-α) , α: 0.67-0.83) whereas a more capacitive character is seen for Co-Cr-Mo and Ti-6Al-4V (CPE(ox) around 20 μF/cm² (rad/s)(1-α) , α around 0.9). Pores, interparticle gaps and incomplete fusion typical for thermal spray coatings were present in these oxides which could have influenced corrosion resistance. The coating microstructure could have allowed some fluid penetration. Overall, these coatings appear to have suitable corrosion properties for wear surfaces.

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Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of chromium oxide‐coated Ti‐6Al‐4V and Co‐Cr‐Mo alloy substrates

et al. 2011

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“…This technique seems to have more success in orthopedic implants when the contacting body is a polymer. Plasma nitriding generally gives a deeper case (e.g., 4 µm) [111,126,128]. However, the COF can also increase resulting in a reduced fretting fatigue strength [111].…”

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confidence: 99%

The Fretting Fatigue Behavior of Ti-6Al-4V

Neu

2008

KEM

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Abstract. This paper reviews the understanding of fretting fatigue with an emphasis on the behavior of Ti-6Al-4V. Advances in life prediction and assessment approaches are highlighted. The role of microstructure on fretting fatigue and its use to detect fretting fatigue damage can now be considered in assessment strategies. Various palliatives are used to enhance the fretting fatigue resistance. These include treatments to introduce compressive residual stress and surface coatings that reduce friction and/or protect the underlying structural material. IntroductionThis paper reviews the tremendous progress over the past decade to understand and predict the fretting fatigue behavior of Ti-6Al-4V, a common alloy used in applications requiring high specific strength. Fretting fatigue is of particular concern for dovetail attachments between the blades and disks in compressors of aerospace gas turbines, spline couplings of shafts, and mechanical joints in orthopedic implants. In the past decade there has been considerable focus on the fretting fatigue behavior of the duplex microstructure consisting of 60 vol. % equiaxed primary α (hcp structure) and 40 vol. % secondary lamellar α+β domains about 10 to 15 µm in size composed of alternating lathes of α and bcc-structured β. This was the baseline microstructure used for several projects carried out under the Air Force High Cycle Fatigue (HCF) program from 1995 to 2005 [1,2]. Unless noted otherwise, the majority of the data reported in this review was generated on this or similar microstructure. The microstructure has an initial random texture with yield strength 930 MPa, ultimate tensile strength 978 MPa, and cyclic yield strength of 797 MPa [1].The fretting fatigue process can be divided into two parts. The first is the formation of fretting cracks and the second is the growth of fretting fatigue cracks. The drivers for each of these processes are different. Both processes must occur to realize a catastrophic fretting fatigue failure. If fretting cracks do not form, fretting fatigue will not occur. But even if fretting cracks form, a catastrophic fretting fatigue failure will not occur if these cracks do not grow outside of the fretting fatigue process volume (FFPV) associated with the formation of the crack. Hence, the fretting fatigue limit is associated with the threshold limit for propagating the fretting cracks. In most fretting fatigue experiments and in applications, the drivers for fretting crack formation and crack growth outside of the FFPV cannot be easily separated, so there is an apparent coupling between the two. However, experiments involving the independent control of the drivers for fretting crack formation and crack growth (e.g., [3,4]) suggest that these two processes can be separated for the purposes of material response and prediction analyses. This is extremely helpful in understanding how different palliatives mitigate the fretting drivers. Some palliatives are aimed at fretting crack formation while others at reducing the fretting fatigue crack...

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“…One approach under investigation is the use of surface modification techniques such as application of hard coatings to metal substrates to improve their tribological characteristics and also reduce the incidence of wear-particle induced osteolysis [10][11][12][13][14][15][16][17]. Application of TiN coating on implant bearing surfaces is one successful surface modification approach for improvement in wear and corrosion resistance [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Application of TiN coating on implant bearing surfaces is one successful surface modification approach for improvement in wear and corrosion resistance [11][12][13]. There are other ceramic materials such as Al 2 O 3 and ZrO 2 which have proven to be beneficial in improving the wear and corrosion performance of articulating surfaces [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of chromium nanocarbide coated Ti–6Al–4V and Co–Cr–Mo alloy substrates

Swaminathan¹,

Zeng²,

Lawrynowicz³

et al. 2012

Electrochimica Acta

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Effect of surface treatments on fretting fatigue damage of biomedical titanium alloys

Cited by 70 publications

References 11 publications

Electrochemical investigation of chromium oxide‐coated Ti‐6Al‐4V and Co‐Cr‐Mo alloy substrates

Electrochemical investigation of chromium oxide‐coated Ti‐6Al‐4V and Co‐Cr‐Mo alloy substrates

The Fretting Fatigue Behavior of Ti-6Al-4V

Electrochemical investigation of chromium nanocarbide coated Ti–6Al–4V and Co–Cr–Mo alloy substrates

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