Comparison of dry and cryogenic machining on chip formation and coefficient of friction in turning AISI 4340 alloy steel

A. Raof, Natasha and A. Ghani, Jaharah and Syarif, Junaidi and Che Haron, Che Hassan and Abdul Hadi, Musfirah (2014) Comparison of dry and cryogenic machining on chip formation and coefficient of friction in turning AISI 4340 alloy steel. In: World Virtual Conference on Advanced Research in Mechanical and Materials Engineering, 18th-22nd March 2014, Kuala Lumpur.

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Abstract

Application of cutting fluid that provides both coolant and lubrication properties in manufacturing operations such as turning, milling, grinding and other processes has been proven to improve the machining output in many aspects. In cryogenic machining, liquid nitrogen (LN2) is used as cutting fluid to reduce the temperature generated at the cutting zone. However, there is still an issue being raised on whether LN2 also functions as a good lubricant as it does as an excellent coolant. Therefore, an intensive study on the chip formation during dry and cryogenic turning of AISI 4340 alloy steel has been conducted to examine the effect of LN2 cutting fluid on the reduction of friction between the chip and the tool. Results from calculation of coefficient of friction indicate that application of LN2 during turning is able to help the friction reduction up to 73%. Smaller value of coefficient of friction indicates that the shear angle is larger which results in smaller shear plane area that provides benefits of lower cutting force needed to shear off the chips and lower cutting temperature being generated during the machining process.

Item Type:	Conference or Workshop Item (Plenary Papers)
Additional Information:	5500/73723
Uncontrolled Keywords:	Cryogenic machining, Chip formation, Coefficient of friction, Lubrication
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA213 Engineering machinery, tools, and implements
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering
Depositing User:	Natasha A. Raof
Date Deposited:	04 Nov 2019 09:03
Last Modified:	08 Nov 2019 14:15
URI:	http://irep.iium.edu.my/id/eprint/73723

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