| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 733683 | Optics & Laser Technology | 2013 | 6 Pages |
The present study investigates the effect of laser peening without coating on aluminum alloy Al-6061-T6 with a 300 mJ infrared laser. The surface topography, microstructure, surface topography, surface residual stress and micro-hardness of peened and unpeened surfaces were studied. The study shows that laser peening without coating can significantly improve surface compressive stress and micro-hardness with trivial increase in surface roughness. Microstructure evaluation confirmed there was no near surface solidification after LPwC.
► Laser peening without coating improved the compressive residual stress to 270%. ► No near surface solidification due to direct laser ablation. ► Micro-hardness showed a maximum of 10 HV increase than unpeened specimen. ► The peening effect pertain up to 0.7 mm from the surface. ► Laser peened surface exhibited X-ray peak broadening.
