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Numerical analysis of laser preheating for laser assisted micro milling of Inconel 718

Abd Rahim, Erween and Warap, N. M. and Mohid, Zazuli and Ibrahim, R. and Rafai, N. (2015) Numerical analysis of laser preheating for laser assisted micro milling of Inconel 718. Applied Mechanics and Materials, 773. pp. 332-336. ISSN 16627482

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Abstract

Micro milling of super alloy materials such as Inconel 718 is challenging due to their excellent mechanical properties. Therefore, new techniques have been suggested to enhance the machinability such as pre-heating the workpiece’s surface to reduce their strength and ductility. Applying pulsed wave laser as a heat source, the prediction of fluctuated temperature distribution in laser assisted micro milling (LAMM) is crucially important. The selection of processing parameters with minimum effect on the processing characteristic is decisive in obtaining high machining quality. Clarifying the effect of heat generated underneath the laser irradiated surface is important to predict the allowable maximum cutting depth and to minimize the risk of tool wear and failure. In this study, ANSYS APDL numerical analysis was used to characterise the workpiece temperature distribution. The numerical model was validated by comparing the results with actual laser irradiation experiment. The experiment was conducted by using Nd:YAG laser with wavelength 1064 nm.

Item Type: Article
Uncontrolled Keywords: Laser assisted micro milling; finite element analysis, Nd:YAG laser
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ1125-1345 Machine shops and machine shop practice
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Manufacturing and Industrial Engineering
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 13 Aug 2018 03:36
Last Modified: 13 Aug 2018 03:36
URI: http://eprints.uthm.edu.my/id/eprint/8742
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