Improved performance in aluminium oxide tool inserts via post sintering using hybrid microwave energy

Mohamed Ariff, Tasnim Firdaus and Firdaus, Muhammad and Norhafiz, Mohd and Iqbal, Mohammad and Hilmy, Irfan (2014) Improved performance in aluminium oxide tool inserts via post sintering using hybrid microwave energy. In: 2nd International Conference on Emerging Trends in Scientific Research, 1-2 November, 2014, Kuala Lumpur.

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Abstract

This research investigates the effect of hybrid microwave energy toward the enhancement of tool life in Al₂O₃ inserts. Post sintering was done using conventional and hybrid microwave sintering at 600°C for 15 mins and compared the findings with the original available commercial inserts. Mechanical testing such as density, hardness and compression strength were performed together with the micro structural analysis using Scanning Electron Microscope (SEM) was done. Tool life of these Al₂O₃ inserts were analysed through dry machining using three different cutting speeds ( 245, 305 and 381 m/min) at the feed rate of 0.2 mm/rev and depth of cut of 0.2 mm. Two different workpieces were used in this research; T6061 Aluminium Alloy and Hardened Steel. Results have shown that the density and hardness remain quite similar with or without the post sintering effect. However, the material became slightly more brittle upon post sintering where conventional sintering produced a compression strength of 0.07 MPa while the hybrid microwave sintering produced a compression strength of 0.21 MPa. Tool life of Al₂O₃ inserts in dry machining of T6061 Aluminium alloy and Hardened Steel has increased by 27.0-40.0 % and 30.6-39.1 % respectively for the hybrid microwave post sintering.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	5202/39811 Published in Handbook on Emerging Trends in scientific Research ISBN: 978-969-9952-07-4. International Conference on Emerging Trends in Scientific Research.
Uncontrolled Keywords:	Aluminium oxide, Post sintering, Hybrid microwave energy, Conventional heating, Tool life, Wear resistance
Subjects:	T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering
Depositing User:	Dr Irfan Hilmy
Date Deposited:	31 Dec 2014 15:45
Last Modified:	01 Sep 2015 00:52
URI:	http://irep.iium.edu.my/id/eprint/39811

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