Effect of laser frequency and focal length on copper surface temperature during laser heating

Yus Erny Amirah, Mohd Yusof and Muhammad Afiq, Ahmad and Aiman, M. H. and Moinuddin, Mohammed Quazi and Mahadzir, Ishak (2022) Effect of laser frequency and focal length on copper surface temperature during laser heating. In: International Conference on Mechanical Engineering Research (ICMER): Technological Advancement in Mechanical and Automotive Engineering. Lecture Notes in Mechanical Engineering book series (LNME) . Springer Singapore, Singapore, pp. 839-846. ISBN 978-981-19-1457-7 (Online); 978-981-19-1456-0 (Printed)


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Laser heating is a process that uses laser as a heat source. In this paper, the copper surface temperature during the laser heating process was studied by controlling the laser frequency and focal length. The laser heating experiment was conducted using a fiber laser marking machine and irradiated with a constant 27 W laser power within a duration of 51 s. The laser frequency and focal length were varied from 100 to 300 kHz and −3 cm to +3 cm, respectively. Meanwhile, laser surface modification (LSM) was performed on the copper rod surface to enhance the laser energy absorption. Furthermore, the defocusing modes for laser heating were used to analyze the variation of temperature. The focus point of the focal length for this experiment was set up at 18.4 cm from the focal plane and denoted as 0. Laser frequency and focal length were found to play an important role in increasing the surface temperature during laser heating since it affects the heat input delivered to the materials. It was found that the surface temperature reaches a higher degree, 879.2 °C with the combination of 200 kHz laser frequency at focal length 0

Item Type: Book Section
Uncontrolled Keywords: Laser heating: surface temperature: focal length: laser frequency
Subjects: T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Institute of Postgraduate Studies
Faculty of Mechanical and Automotive Engineering Technology
Depositing User: Ms. Ratna Wilis Haryati Mustapa
Date Deposited: 12 Sep 2022 02:36
Last Modified: 12 Sep 2022 02:36
URI: http://umpir.ump.edu.my/id/eprint/35147
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