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Shape Deviation of Surface Structures Produced by WaveShape (Structuring by Laser Remelting) on Ti6Al4V and a Method
Oleg Oreshkin1, Daniil Panov2, Laura Kreinest3
1Moscow Engineering Physics Institute, National Research Nuclear University MEPhI, Kashirskoe Shosse 31, 115409 Moscow, Russia.
Micromachines
|April 3, 2021
Summary
Laser surface structuring using WaveShape can create precise metal patterns. A new method reduces shape deviations in harmonic structures by adding a compensation signal, improving accuracy by up to 91%.
Area of Science:
- Manufacturing Engineering
- Materials Science
- Surface Engineering
Background:
- Laser structuring by remelting (WaveShape) generates surface patterns without material removal.
- The process relies on controlled motion of the three-phase line during solidification.
- Harmonic surface structures are typically produced, but significant shape deviations occur.
Purpose of the Study:
- To investigate the cause of shape deviations in WaveShape laser structuring.
- To develop and test a method for reducing these shape deviations.
- To optimize the compensation signal for improved surface structure accuracy.
Main Methods:
- Identified shape deviations concentrated at half the structuring wavelength.
- Superimposed a compensation signal with half the spatial wavelength onto the harmonic structuring signal.
- Varied amplitude and phase shift of the compensation signal for different laser parameters.
Main Results:
- Shape deviations in harmonic surface structures were significantly reduced.
- A reduction of up to 91% in shape deviation was achieved on titanium alloy Ti6Al4V.
- The effectiveness of the compensation signal was demonstrated for specific laser beam diameters and wavelengths.
Conclusions:
- Superimposing an adapted compensation signal effectively reduces shape deviations in WaveShape laser structuring.
- This method enhances the accuracy of harmonic surface structures on metal alloys.
- Optimized compensation signals offer a viable solution for precise laser-based surface manufacturing.
