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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
213 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 languageEnglish
Pages (from-to)574-578
Number of pages5
JournalSurface and Coatings Technology
Volume320
Early online date02 Nov 2016
DOIs
Publication statusPublished - 25 Jun 2017

Keywords

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

Fingerprint

Dive into the research topics of 'A study on the corrosion fatigue behaviour of laser-welded shape memory NiTi wires in a simulated body fluid'. Together they form a unique fingerprint.

Cite this