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Increasing the efficiency of material removal using dual laser micromachining

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posted on 22.04.2020, 10:59 authored by Osama Alkhawaldeh, Jeremy CouplandJeremy Coupland, Lewis JonesLewis Jones
A continuous wave melting laser combined with a nanosecond ejection laser has been shown to improve the material removal efficiency by a factor of 2 to 8 compared to laser ablation processes reported in the literature. The decrease in the energy required for the combined lasers is primarily due to the optimisation of the irradiation time in the melting process, which is responsible for the majority of the total energy. For the laser used in this study, the optimal interaction time corresponding to the highest melting efficiency was found at 9 ms melting time, and this value is compared with results derived from a one-dimensional heating model. Metallurgical images of only melting and the produced hole after introducing the ejection pulse for the most efficient melting were presented as evidence of melt ejection. The results show that approximately 90% of the melt pool is ejected with little redeposited material at the periphery of the hole.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

The International Journal of Advanced Manufacturing Technology

Volume

107

Pages

3995 - 4007

Publisher

Springer

Version

VoR (Version of Record)

Rights holder

© The Authors

Publisher statement

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Acceptance date

26/03/2020

Publication date

2020-04-23

Copyright date

2020

ISSN

0268-3768

eISSN

1433-3015

Language

en

Depositor

Dr Lewis Jones. Deposit date: 20 April 2020

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