A study on the corrosion fatigue behaviour of laser-welded shape memory NiTi wires in a simulated body fluid

Chi-Wai Chan

doi:10.1016/j.surfcoat.2016.10.094

A study on the corrosion fatigue behaviour of laser-welded shape memory NiTi wires in a simulated body fluid

Chi-Wai Chan

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

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349 Downloads (Pure)

Abstract

Corrosion fatigue is a fracture process as a consequence of synergistic interactions between the material microstructure, corrosive environment and cyclic loads/strains. It can cause unexpected failure of medical and dental implants in the human body. This study reveals a comparison of corrosion fatigue behaviour between shape memory NiTi wire and its laser weldment using bending rotation fatigue (BRF) test integrated with a specifically-designed corrosion cell. The testing medium was Hanks’ salt solution kept at 37.5 oC. Electrochemical impedance spectroscopic (EIS) measurement was carried out to monitor the change of corrosion resistance of the samples during the BRF tests at different periods of immersion time in Hanks’ solution. Scanning electron microscopy (SEM) was used to analyse the fracture surfaces. This study provides important information on the susceptibility of NiTi alloy and its weldment to corrosion fatigue in Hanks’ solution.

Original language	English
Pages (from-to)	574-578
Number of pages	5
Journal	Surface and Coatings Technology
Volume	320
Early online date	02 Nov 2016
DOIs	https://doi.org/10.1016/j.surfcoat.2016.10.094
Publication status	Published - 25 Jun 2017

Keywords

Laser welding, shape memory alloys, NiTi, corrosion fatigue, Hanks’ solution

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10.1016/j.surfcoat.2016.10.094Licence: Unspecified

A study on the corrosion fatigue behaviour of laser-welded shape memory NiTi wires in a simulated body fluid
© 2016 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/,which permits distribution and reproduction for non-commercial purposes, provided the author and source are cited.
Accepted author manuscript, 598 KBLicence: CC BY-NC-ND

The 8th International Conference On Technological Advances Of Thin Films and Surface Coatings
Chi Wai Chan (Invited speaker)
13 Jul 2016 → 15 Jul 2016
Activity: Participating in or organising an event types › Participation in conference

Cite this

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title = "A study on the corrosion fatigue behaviour of laser-welded shape memory NiTi wires in a simulated body fluid",

abstract = "Corrosion fatigue is a fracture process as a consequence of synergistic interactions between the material microstructure, corrosive environment and cyclic loads/strains. It can cause unexpected failure of medical and dental implants in the human body. This study reveals a comparison of corrosion fatigue behaviour between shape memory NiTi wire and its laser weldment using bending rotation fatigue (BRF) test integrated with a specifically-designed corrosion cell. The testing medium was Hanks{\textquoteright} salt solution kept at 37.5 oC. Electrochemical impedance spectroscopic (EIS) measurement was carried out to monitor the change of corrosion resistance of the samples during the BRF tests at different periods of immersion time in Hanks{\textquoteright} solution. Scanning electron microscopy (SEM) was used to analyse the fracture surfaces. This study provides important information on the susceptibility of NiTi alloy and its weldment to corrosion fatigue in Hanks{\textquoteright} solution.",

keywords = "Laser welding, shape memory alloys, NiTi, corrosion fatigue, Hanks{\textquoteright} solution",

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N2 - Corrosion fatigue is a fracture process as a consequence of synergistic interactions between the material microstructure, corrosive environment and cyclic loads/strains. It can cause unexpected failure of medical and dental implants in the human body. This study reveals a comparison of corrosion fatigue behaviour between shape memory NiTi wire and its laser weldment using bending rotation fatigue (BRF) test integrated with a specifically-designed corrosion cell. The testing medium was Hanks’ salt solution kept at 37.5 oC. Electrochemical impedance spectroscopic (EIS) measurement was carried out to monitor the change of corrosion resistance of the samples during the BRF tests at different periods of immersion time in Hanks’ solution. Scanning electron microscopy (SEM) was used to analyse the fracture surfaces. This study provides important information on the susceptibility of NiTi alloy and its weldment to corrosion fatigue in Hanks’ solution.

AB - Corrosion fatigue is a fracture process as a consequence of synergistic interactions between the material microstructure, corrosive environment and cyclic loads/strains. It can cause unexpected failure of medical and dental implants in the human body. This study reveals a comparison of corrosion fatigue behaviour between shape memory NiTi wire and its laser weldment using bending rotation fatigue (BRF) test integrated with a specifically-designed corrosion cell. The testing medium was Hanks’ salt solution kept at 37.5 oC. Electrochemical impedance spectroscopic (EIS) measurement was carried out to monitor the change of corrosion resistance of the samples during the BRF tests at different periods of immersion time in Hanks’ solution. Scanning electron microscopy (SEM) was used to analyse the fracture surfaces. This study provides important information on the susceptibility of NiTi alloy and its weldment to corrosion fatigue in Hanks’ solution.

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DO - 10.1016/j.surfcoat.2016.10.094

M3 - Article

SN - 0257-8972

VL - 320

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EP - 578

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

ER -

A study on the corrosion fatigue behaviour of laser-welded shape memory NiTi wires in a simulated body fluid

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The 8th International Conference On Technological Advances Of Thin Films and Surface Coatings

Cite this