Investigation of chip formation during turning of aluminum alloys 7075-T651 in dry and chilled air condition

Rosli, Muhammad Izzat Amin and A. Raof, Natasha and Dahnel, Aishah Najiah and Mokhtar, Suhaily and Muhamad Khairussaleh, Nor Khairusshima (2023) Investigation of chip formation during turning of aluminum alloys 7075-T651 in dry and chilled air condition. In: 5th International Conference on Advances in Manufacturing and Materials Engineering, 9-10 August 2022, Kulliyyah of Engineering, IIUM.

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Abstract

Aluminum alloys 7075-T651 is a ductile material which may lead to tool damage and machined surface deterioration due to the formation of built-up-edge (BUE) and adhesion layer during machining especially in dry cutting condition. This paper discusses the chip formation of aluminum alloys 7075-T651 during turning in green environment. Uncoated carbide KW10 cutting tool was used to machine Al7075-T651 in dry and chilled air condition. The cutting speed and feed rate were varied to 450 to 650 m/min and 0.15 mm/rev − 0.05 mm/rev, respectively. The depth of cut was fixed to 0.5 mm. The chip formation was observed and measured in term of chip type, chip thickness and co-efficient of friction. It was found that, among the types of chips produced in turning Al7075-T651 were snarled tubular ribbon, loose arc and long washer-type helical. The thickness of the chip increased as the feed increases by 253% hence increased the friction coefficient by 104.7%. Meanwhile, the chip thickness decreased 5.19% when the cutting speed increased, hence reducing the coefficient of friction by 14.6%. Chilled air machining produced 7.11% thinner chips than dry machining, which lowered the friction coefficient by 19.7%. Therefore, it can be concluded that, machining Al7075-T651 at low feed rate and high cutting speed in chilled air cutting environment may help to improve the lubrication and further enhancing the machining outputs.

Item Type:	Proceeding Paper (Other)
Uncontrolled Keywords:	Aluminum alloys 7075-T651 · Chilled air · Chip formation · Coefficient of friction
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA170 Environmental engineering. Sustainable engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Natasha A. Raof
Date Deposited:	01 Oct 2024 09:52
Last Modified:	01 Oct 2024 09:52
URI:	http://irep.iium.edu.my/id/eprint/114752

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