Surface Structuring by Laser Remelting (WaveShape): Microstructuring of Ti6Al4V for a Small Laser Beam Diameter and High Scan Speeds

The appearance of a surface is a crucial characteristic of a part or component. Laser-based micromachining gets increasingly important in generating tailored surface topographies. A novel structuring technique for surface engineering is surface structuring by laser remelting (WaveShape), in which surface features are created without material loss. In this study, we investigated the evolution of surface topographies on Ti6Al4V for a laser beam diameter of 50 m and scan speeds larger than 100 mm/s. Surface features with aspect ratios (ratio of height to width) of almost 1:1 were achieved using the WaveShape process. Furthermore, wavelengths smaller than 500 m could be effectively structured using scan speeds of up to 500 mm/s. The experimental results showed further that the efficiency of the WaveShape process in terms of achieved structure height per unit time significantly increases for high scan speeds.

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Effect of Laser Beam Diameter on Cut Edge of Steel Plates Obtained by Laser Machining

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.467.227 ◽

2013 ◽

Vol 467 ◽

pp. 227-232 ◽

Cited By ~ 4

Author(s):

Imed Miraoui ◽

Mouna Zaied ◽

Mohamed Boujelbene

Keyword(s):

Laser Beam ◽

Laser Cutting ◽

Steel Plates ◽

Beam Diameter ◽

Power Laser ◽

Laser Beam Diameter ◽

Machined Surface ◽

Cut Edge ◽

Thermal Influence ◽

Cut Surface

Laser cutting is a thermal process which is used contactless to separate materials. In the present study, high-power laser cutting of steel plates is considered and the thermal influence of laser cutting on the cut edges is examined. The microstructure and the microhardness of the cut edge are affected by the input laser cutting parameter: laser beam diameter. The aim of this work is to investigate the effect of the laser beam diameter on the microhardness beneath the cut surface of steel plates obtained by CO2 laser cutting. The cut surface was studied based on microhardness depth profiles beneath the machined surface. The results show that laser cutting has a thermal effect on the surface microstructure and on the microhardness beneath the cut section. Also the microhardness of the hardening zone depends on the laser beam diameter.

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Analysis of Roughness and Heat Affected Zone of Steel Plates Obtained by Laser Cutting

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.974.169 ◽

2014 ◽

Vol 974 ◽

pp. 169-173 ◽

Cited By ~ 5

Author(s):

Imed Miraoui ◽

Mohamed Boujelbene ◽

Emin Bayraktar

Keyword(s):

Surface Roughness ◽

Laser Beam ◽

Heat Affected Zone ◽

Laser Power ◽

Laser Cutting ◽

Major Effect ◽

Steel Plates ◽

Beam Diameter ◽

Laser Beam Diameter ◽

Cut Surface

In the present study, high-power CO2 laser cutting of steel plates has been investigated and the effect of the input laser cutting parameters on the cut surface quality is analyzed. The average roughness of the cut surface of the specimens, produced by different laser beam diameter and laser power, were measured by using roughness tester. The scanning electron microscopy SEM is used to record possible metallurgical alterations on the cut edge. The aim of this work is to investigate the effect of laser beam diameter and laser power on the cut surface roughness and on the heat affected zone width HAZ of steel plates obtained by CO2 laser cutting. An overall optimization was applied to find out the optimal cutting setting that would improve the cut surface quality. It was found that laser beam diameter has a negligible effect on surface roughness but laser power had major effect on roughness. The cut surface roughness decreases as laser power increases. Improved surface roughness can be obtained at higher laser power. Also, laser beam diameter and laser power had major effect on HAZ width. It increases as laser power increases.

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