Tribocorrosion behaviour of laser cladded biomedical grade titanium alloy

B. A. Obadele; A. Andrews; P. A. Olubambi; M. T. Mathew; S. Pityana

doi:10.1002/maco.201408037

Tribocorrosion behaviour of laser cladded biomedical grade titanium alloy

B. A. Obadele, A. Andrews, P. A. Olubambi, M. T. Mathew, S. Pityana

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The tribocorrosion behaviour of laser cladded Ti6Al4V sliding against alumina ball in 3.5% NaCl has been assessed. Commercially pure (CP) Ti particles were laser cladded on Ti6Al4V using ytterbium laser system (YLS). The tribocorrosion behaviour of Ti6Al4V before and after treatment was investigated in 3.5% NaCl (pH = 6.24) and modified 3.5% NaCl (pH = 4) solutions using a pin-on-disk tribometer with integrated potentiostat. Potentiodynamic polarization curves indicated that the corrosion potentials of cladded Ti6Al4V decreased compared to that of the uncladded samples. Additionally, the corrosion current densities of cladded Ti6Al4V decreased significantly in both electrolytes investigated. The tribocorrosion behaviour of cladded Ti6Al4V did not change significantly. The wear depth of cladded Ti6Al4V decreased significantly in modified 3.5% NaCl whilst remaining unchanged in 3.5% NaCl. The coefficient of friction (COF) increased with time in Ti6Al4V whilst that of cladded sample decreased marginally with time in both electrolytes.

Original language	English
Pages (from-to)	1133-1139
Number of pages	7
Journal	Materials and Corrosion - Werkstoffe und Korrosion
Volume	66
Issue number	10
DOIs	https://doi.org/10.1002/maco.201408037
Publication status	Published - 1 Oct 2015
Externally published	Yes

Keywords

CP Ti
Implants
Laser cladding
Ti6Al4V
Tribocorrosion

ASJC Scopus subject areas

Environmental Chemistry
Mechanics of Materials
Mechanical Engineering
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1002/maco.201408037

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title = "Tribocorrosion behaviour of laser cladded biomedical grade titanium alloy",

abstract = "The tribocorrosion behaviour of laser cladded Ti6Al4V sliding against alumina ball in 3.5% NaCl has been assessed. Commercially pure (CP) Ti particles were laser cladded on Ti6Al4V using ytterbium laser system (YLS). The tribocorrosion behaviour of Ti6Al4V before and after treatment was investigated in 3.5% NaCl (pH = 6.24) and modified 3.5% NaCl (pH = 4) solutions using a pin-on-disk tribometer with integrated potentiostat. Potentiodynamic polarization curves indicated that the corrosion potentials of cladded Ti6Al4V decreased compared to that of the uncladded samples. Additionally, the corrosion current densities of cladded Ti6Al4V decreased significantly in both electrolytes investigated. The tribocorrosion behaviour of cladded Ti6Al4V did not change significantly. The wear depth of cladded Ti6Al4V decreased significantly in modified 3.5% NaCl whilst remaining unchanged in 3.5% NaCl. The coefficient of friction (COF) increased with time in Ti6Al4V whilst that of cladded sample decreased marginally with time in both electrolytes.",

keywords = "CP Ti, Implants, Laser cladding, Ti6Al4V, Tribocorrosion",

author = "Obadele, {B. A.} and A. Andrews and Olubambi, {P. A.} and Mathew, {M. T.} and S. Pityana",

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T1 - Tribocorrosion behaviour of laser cladded biomedical grade titanium alloy

AU - Obadele, B. A.

AU - Andrews, A.

AU - Olubambi, P. A.

AU - Mathew, M. T.

AU - Pityana, S.

PY - 2015/10/1

Y1 - 2015/10/1

N2 - The tribocorrosion behaviour of laser cladded Ti6Al4V sliding against alumina ball in 3.5% NaCl has been assessed. Commercially pure (CP) Ti particles were laser cladded on Ti6Al4V using ytterbium laser system (YLS). The tribocorrosion behaviour of Ti6Al4V before and after treatment was investigated in 3.5% NaCl (pH = 6.24) and modified 3.5% NaCl (pH = 4) solutions using a pin-on-disk tribometer with integrated potentiostat. Potentiodynamic polarization curves indicated that the corrosion potentials of cladded Ti6Al4V decreased compared to that of the uncladded samples. Additionally, the corrosion current densities of cladded Ti6Al4V decreased significantly in both electrolytes investigated. The tribocorrosion behaviour of cladded Ti6Al4V did not change significantly. The wear depth of cladded Ti6Al4V decreased significantly in modified 3.5% NaCl whilst remaining unchanged in 3.5% NaCl. The coefficient of friction (COF) increased with time in Ti6Al4V whilst that of cladded sample decreased marginally with time in both electrolytes.

AB - The tribocorrosion behaviour of laser cladded Ti6Al4V sliding against alumina ball in 3.5% NaCl has been assessed. Commercially pure (CP) Ti particles were laser cladded on Ti6Al4V using ytterbium laser system (YLS). The tribocorrosion behaviour of Ti6Al4V before and after treatment was investigated in 3.5% NaCl (pH = 6.24) and modified 3.5% NaCl (pH = 4) solutions using a pin-on-disk tribometer with integrated potentiostat. Potentiodynamic polarization curves indicated that the corrosion potentials of cladded Ti6Al4V decreased compared to that of the uncladded samples. Additionally, the corrosion current densities of cladded Ti6Al4V decreased significantly in both electrolytes investigated. The tribocorrosion behaviour of cladded Ti6Al4V did not change significantly. The wear depth of cladded Ti6Al4V decreased significantly in modified 3.5% NaCl whilst remaining unchanged in 3.5% NaCl. The coefficient of friction (COF) increased with time in Ti6Al4V whilst that of cladded sample decreased marginally with time in both electrolytes.

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KW - Laser cladding

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KW - Tribocorrosion

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Tribocorrosion behaviour of laser cladded biomedical grade titanium alloy

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