Underwater laser micro-milling of fine-grained aluminium and the process modelling by machine learning
- 5 February 2020
- journal article
- research article
- Published by IOP Publishing in Journal of Micromechanics and Microengineering
- Vol. 30 (4), 045011
- https://doi.org/10.1088/1361-6439/ab7322
Abstract
Nanosecond-pulsed laser ablation is often accompanied by adverse thermal effects such as oxidation, debris recast and burr formation. To reduce these effects, in this paper, the authors present the underwater laser milling process using RSA-905 fine-grained aluminium as the target material for the first time. The results show that channels up to 200 μm in width, 700 μm depth and bottom roughness around 1 µm Ra could be fabricated with reduced thermal effects. By conducting multi- and single-factor experiments, empirical models relating the laser processing parameters to the key dimensions of channels were derived using artificial neural network (ANN) algorithm and polynomial regression (PR), and the models' accuracies were evaluated. Based on the models, the cross-section profile of a channel subject to a given set of processing parameters can be predicted. The process can serve as a pre-treatment technique of mechanical milling such that the tool life will be extended and the profile of a desired feature can be precisely defined.Keywords
Funding Information
- Singapore Institute of Manufacturing Technology (C17-M-028)
- Liaoning Revitalisation Talents Programme (XLYC1807230)
- Fundamental Research Funds for the Central Universities (DUT17RC(3)105)
This publication has 37 references indexed in Scilit:
- The Role of the Assist Gas Nature in Laser Cutting of Aluminum AlloysPhysics Procedia, 2011
- Micro-machining of silicon wafer in air and under waterOptics & Laser Technology, 2010
- Laser ablation in a liquid-confined environment using a nanosecond laser pulseJournal of Applied Physics, 2008
- Modelling the geometry of a moving laser melt pool and deposition track via energy and mass balancesJournal of Physics D: Applied Physics, 2004
- Underwater and water-assisted laser processing: Part 1—general features, steam cleaning and shock processingOptics and Lasers in Engineering, 2004
- Inducing and probing non-thermal transitions in semiconductors using femtosecond laser pulsesNature Materials, 2002
- Femtosecond ablation of ultrahard materialsApplied Physics A, 2002
- Introduction to multi-layer feed-forward neural networksChemometrics and Intelligent Laboratory Systems, 1997
- Cross-Validation, the Jackknife, and the Bootstrap: Excess Error Estimation in Forward Logistic RegressionJournal of the American Statistical Association, 1986
- A New Method of Interpolation and Smooth Curve Fitting Based on Local ProceduresJournal of the ACM, 1970