Laser Beam Micro-milling of Micro-channels in Aerospace Alloys by Saied Muhammed Hassan Darwish Naveed Ahmed & Abdulrahman M. Al-Ahmari

Author:Saied Muhammed Hassan Darwish, Naveed Ahmed & Abdulrahman M. Al-Ahmari
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

Fig. 52D contour plots associated with NA 100 × 50 µm micro-channels: a top width, b bottom width, c depth, and d taperness

From the below figures, it can be seen that an increase in current intensity (x1) and pulse frequency (x2) increases the micro-channels top width (XT), depth (Z), and taper angle (ϴ) while keeping the laser scan speed at constant value. On the other hand, the bottom width of micro-channel is decreased by increasing the lamp current intensity and pulse frequency. The combined effect of lamp current intensity (x1) and scan speed (x3) shows that keeping the pulse frequency at constant level, the rise in current intensity and scan speed enlarge the top width (XT), and depth (Z) of micro-channel and decrease the bottom width (XB) and taperness of sidewalls (ϴ). Mutual effects of pulse frequency (x2) and scan speed (x3) reveal that the top width (XT), bottom width (XB) and taper angle of sidewalls (ϴ) increases as the pulse frequency and scan speed increases. Whereas, the depth (Z) of micro-channel significantly decreases by increasing the pulse frequency and scan speed of laser spot. In order to achieve the desired range of each of the geometrical response, the individual value of laser parameters can be selected by consulting the 2D contour plots shown in Fig. 5.

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