Surface modification of Ti6Al4V alloy by pulsed Yb-laser irradiation for enhanced adhesive bonding

Influence of surface pre-treatments on the high-cycle fatigue behavior of Ti–6Al–4V – From anodizing to laser-assisted techniques

“…Related studies revealed that varying laser parameters have a significant influence on surface chemistry, morphology and bonding strength [5,5,29]. The fairly large process window allows an improvement of bonding properties [5,6,29].…”

“…It is well known that Ti-6Al-4V is very sensitive to residual stresses, grain refinement and nano-as well as micro-roughness [16,[26][27][28][29][30][31][51][52][53]. Especially due to the letter aspect specimens treated by parameter set 3 show inferior properties.…”

“…Based on those studies, conditions showing superior bonding properties were employed in the present study. Figures 2a and b show cross-sectional views of representative surface structures obtained for both anodizing treatments [29], i.e. NaTESi ( Fig.…”

“…Removal of contamination from the surface [25], residual stresses, grain refinement and nano-as well as micro-roughness have been the focus of recent studies [16,[26][27][28][29][30][31]. In the last decade, various authors have shown that the surface and the mechanical properties of metals and alloys can be positively influenced by laser shock peening [24,31,32].…”

Enhancement of static strength and long term durability of steel/epoxy joints through a fiber laser surface pre-treatment

“…As a consequence, the mechanical behavior of adhesive joints is improved because of the increased mechanical interlocking between the adhesive and the substrates [19] and the improved chemical bonding between adhesive molecules and the surface metal oxide [19,20]. Recent contributions have demonstrated the effectiveness of laser treatment to improve toughness, strength and durability of epoxy bonds with different metals, including aluminum [21], titanium [22,23,24] and steel [25]. Moreover, since the laser beam can be guided automatically with a very precise position and speed control, laser surface irradiation also enabled the fabrication of textured surfaces with improved wear, wettability and adhesion performances [10,26].…”