Abstract
Laser gas nitriding process (LGN) was applied on NiTi shape memory alloy to obtain an alloyed surface consisting of TiN dendrites in NiTi matrix. By applying subsequent selective etching process, the matrix material in the alloyed layer can be selectively removed and a three-dimensional network of TiN dendrites is left on the surface protruding from the metal substrate. The 3D dendritic network provides extra surface area and locking mechanism for the adhesion joint. The microstructures of such textured surface were examined. The adhesion jointing characteristics of the surfaces were studied. A 150% increase in the lap-joint strength was achieved in the laser gas nitrided and etched specimen as compared with the sandblasted and etched ones.
Original language | English |
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Pages (from-to) | 1595-1600 |
Number of pages | 6 |
Journal | Applied Surface Science |
Volume | 253 |
Issue number | 3 |
DOIs | |
Publication status | Published - 30 Nov 2006 |
Keywords
- Adhesive bonding
- Laser gas nitriding
- NiTi alloy
- Shape memory alloy
- Textured surface
ASJC Scopus subject areas
- Surfaces, Coatings and Films