Parametric Analysis Of Heat-Affected Zone (HAZ) Characteristic And Taper Angle During Machining Of Alumina Ceramic Using CO2 Laser

B.  Umroh; Md Nizam Abd  Rahman; Nur Athirah Mohd  Zailani; Mohd Najib Ali  Mokhtar; I  Irianto; A.  Ginting; R.L.  Muhamud

doi:10.6180/jase.202404_27(4).0012

Parametric Analysis Of Heat-Affected Zone (HAZ) Characteristic And Taper Angle During Machining Of Alumina Ceramic Using CO2 Laser

Parametric Analysis Of Heat-Affected Zone (HAZ) Characterictic And Taper Angle During Machining Of Alumina Ceramic Using CO2 Laser

B. Umroh^1,2, Md Nizam Abd Rahman¹This email address is being protected from spambots. You need JavaScript enabled to view it., Nur Athirah Mohd Zailani¹, Mohd Najib Ali Mokhtar¹, I Irianto³, A. Ginting⁴, R.L. Muhamud⁵

¹Faculty of Manufacturing Engineering, Universiti Teknikal Malaysia Melaka, Jalan Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia

²Faculty of Engineering Universitas Medan Area, Jalan Kolam No. 1, 20223 Medan Estate, Indonesia

³Department-General Education, Faculty of Resilience, Rabdan Academy, Abu Dhabi 22401, United Arab Emirates

⁴Laboratory of Machining Processes, Department of Mechanical Engineering, Faculty of Engineering, Universitas Sumatera Utara, Jalan Almamater, Building J17.01.01, Medan 20155, Indonesia

⁵RS Advanced Technology Sdn. Bhd. No. 35G, Jalan Mutiara Subang 1, Taman Mutiara Subang, 47500 Subang Jaya, Selangor, Malaysia

Received: February 26, 2023
Accepted: August 26, 2023
Publication Date: September 27, 2023

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.202404_27(4).0012

Alumina is widely used in the automotive, electrical component and aircraft industries due to its low thermal conductivity and high hardness. However, alumina is notoriously difficult to machine due to its extreme hardness. According to some researchers, laser machining offers a cost-effective machining technique for alumina. Even though many works on laser machining of alumina have been published, most have focused on thin alumina plates. This study determined the effect of a CO₂ laser machining method on hole quality in terms of the heat-affected zone (HAZ) and taper angle for 3 mm alumina thickness. Design of Experiment (DOE) was performed to identify the effect of laser power and frequency on the output findings. The HAZ and the taper angle were measured using a Scanning Electron Microscopy image. Based on the ANOVA analysis, HAZ and taper angles were influenced by the laser power input. The HAZ thickness increased as laser power and frequency decreased, but the taper angle decreased as frequency decreased. Low laser power (50 W) resulted in a small inlet diameter (0.236 mm), while high laser power (150 W) resulted in a larger inlet diameter (0.272 mm). Multi-response optimization analysis for both HAZ and taper angle showed that 149 W and 2956 Hz frequency were the optimum process parameters which yielded the best output conditions.

Keywords: Alumina; CO2 Laser machining; HAZ; Taper; Optimization

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