Investigation of the Material Removal Efficiency During Femtosecond Laser Machining

Features of plasma plume evolution and material removal efficiency during femtosecond laser ablation of nickel in high vacuum

Applied Physics A ◽

10.1007/s00339-007-4211-6 ◽

2007 ◽

Vol 89 (4) ◽

pp. 1017-1024 ◽

Cited By ~ 48

Author(s):

S. Amoruso ◽

R. Bruzzese ◽

C. Pagano ◽

X. Wang

Keyword(s):

Laser Ablation ◽

Femtosecond Laser ◽

Removal Efficiency ◽

Material Removal ◽

Plasma Plume ◽

High Vacuum ◽

Femtosecond Laser Ablation

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High-Throughput Picosecond Laser Machining of Aerospace Nickel Superalloy

Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture ◽

10.1177/09544054211028842 ◽

2021 ◽

pp. 095440542110288

Author(s):

Sundar Marimuthu ◽

Bethan Smith

Keyword(s):

Surface Roughness ◽

Material Removal Rate ◽

Material Removal ◽

Thermal Damage ◽

Removal Rate ◽

Picosecond Laser ◽

Nickel Superalloy ◽

Laser Machining ◽

Process Conditions ◽

Machining Performance

This manuscript discusses the experimental results on 300 W picosecond laser machining of aerospace-grade nickel superalloy. The effect of the laser’s energetic and beam scanning parameters on the machining performance has been studied in detail. The machining performance has been investigated in terms of surface roughness, sub-surface thermal damage, and material removal rate. At optimal process conditions, a picosecond laser with an average power output of 300 W can be used to achieve a material removal rate (MRR) of ∼140 mm3/min, with thermal damage less than 20 µm. Shorter laser pulse widths increase the material removal rate and reduce the resultant surface roughness. High scanning speeds improve the picosecond laser machining performance. Edge wall taper of ∼10° was observed over all the picosecond laser machined slots. The investigation demonstrates that high-power picosecond lasers can be used for the macro-machining of industrial components at an acceptable speed and quality.

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Investigation of the Water Guided Laser Micro-Jet Machining of Aero Engine Components

Volume 1: Processes ◽

10.1115/msec2017-2723 ◽

2017 ◽

Author(s):

Zhigang Wang

Keyword(s):

Energy Density ◽

Material Removal ◽

Removal Rate ◽

Cutting Speed ◽

Potential Method ◽

Laser Machining ◽

Aero Engine ◽

Engine Components ◽

The Relationship ◽

Dual Laser

The water guided laser micro-jet (LMJ) is a new potential method to machine aero engine parts with much less heat affected area and faster cutting speed than dry laser machining. The focus of this paper is to investigate the energy density and material removal for a dual-laser LMJ system. Then, the effects of dominated parameters on the energy density of LMJ are analyzed. Finally, a mathematical model is developed to describe the relationship between dominant laser parameters with the energy density of LMJ and material removal rate followed by machining case studies of aero engine components.

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