Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29089
Title: Laser welding of thin foil nickeltitanium shape memory alloy
Authors: Chan, CW
Man, HC 
Issue Date: 2011
Source: Optics and lasers in engineering, 2011, v. 49, no. 1, p. 121-126
Abstract: In this study, two L27 Taguchi experiments were carried out to study the effect of fibre laser welding parameters and their interactions upon the weld bead aspect ratio of nickeltitanium thin foil. The optimum parameters to produce full penetrated weld with the largest aspect ratio and desirable microstructure were successfully obtained by the Taguchi experimental design. The corrosion property of the optimized NiTi weld in Hank's solution at 37.5 °C was studied and compared with the as-received NiTi. To improve the corrosion properties of the weld, the effect of post-weld-heat-treatments ranging from 573 to 1173 K was investigated. The corrosion properties, surface morphology, microstructure and Ti/Ni ratio of the heat-treated NiTi weld were analysed. It was found that a post-weld heat treatment at 573 K for 1 h provided the best pitting corrosion resistance at the weld zone.
Keywords: Laser welding
NiTi
Pitting corrosion
Shape memory alloy
Taguchi method
Journal: Optics and Lasers in Engineering 
ISSN: 0143-8166
DOI: 10.1016/j.optlaseng.2010.08.007
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