Machining-induced grain refinement of AISI 4340 alloy steel under dry and cryogenic conditions

A. Raof, Natasha and A. Ghani, Jaharah and Che Haron, Che Hassan (2019) Machining-induced grain refinement of AISI 4340 alloy steel under dry and cryogenic conditions. Journal of Materials Research and Technology, 8 (5). pp. 4347-4353. ISSN 2238-7854

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Abstract

Machining significantly influences surface integrity, metallurgical structure, grain size and thereby the mechanical, chemical and physical properties of the component. The presented investigation concentrates on grain refinement in turning of AISI 4340 alloy steel in dry and cryogenic turning. With cutting temperatures below 950 ◦C, the resulted surface layer consists of a microstructure with ultrafine white globular particles in all samples. A higher percentage of these particles was observed when using cryogenic flushing. It resulted in improved surface and subsurface properties in terms of ultrafine microstructure concentration, higher micro hardness, influence on the thickness and composition of the surface, and subsurface layers and thermal stability

Item Type:	Article (Journal)
Additional Information:	5500/78130
Uncontrolled Keywords:	Cryogenic machining; AISI 4340 alloy steel; Globular particle
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) > TA170 Environmental engineering. Sustainable engineering T Technology > TA Engineering (General). Civil engineering (General) > TA213 Engineering machinery, tools, and implements T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Natasha A. Raof
Date Deposited:	29 Jan 2020 17:07
Last Modified:	27 Feb 2020 12:03
URI:	http://irep.iium.edu.my/id/eprint/78130

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