2021 Volume 72 Issue 12 Pages 695-700
Laser irradiation effects on adhesive properties of A5052 aluminum alloy sheet were examined. A hot melt adhesive sheet comprising polyamide resin was used as the adhesive. The shear strength of adhered specimens was measured using tensile testing. The joining strength was inferred as equal to the shear strength. The laser-irradiated surface changed slightly for high laser scanning speeds. Then ruggedness formed on the surface at lower laser scanning speeds. A spire-like surface was formed, especially when the scanning speed was 50-100 mm/s. Laser irradiation under these conditions exhibited adhesiveness sufficient for plastic deformation of the aluminum substrate. Results showed that the joining strength was attributable to the anchor effect.
