Machinability of Inconel 718 in MQL turning using hybrid microwaved silicon nitride inserts

Ariff, Tasnim Firdaus and Sakib, Mohammad Nazmus (2024) Machinability of Inconel 718 in MQL turning using hybrid microwaved silicon nitride inserts. Jurnal Tribologi, 42. pp. 216-230. ISSN 2289-7232 E-ISSN 2289-7232

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Abstract

Machining Inconel 718 requires high strength inserts with high hot hardness and is challenging due to its high strength and thermal stability. Nonetheless, high wear rates, frequent tool change, extra time and increased tool cost are anticipated despite using large amounts of ecologically unfriendly synthetic cutting fluids. Several options on using vegetable oils and Minimum Quantity Lubrication (MQL) were explored but not with microwave treated inserts. This study intends to investigate using eco-friendly options such as dry and MQL turning on Inconel 718 with untreated and hybrid microwaved (HMW) treated Si3N4 inserts at 200C for 15 minutes. The cutting speed (145 m/min), feed rate (0.08mm/rev) and depth-of-cut (0.1 mm) remained constant. The tool wear and surface roughness were measured and the efficacy of the HMW treatment was analyzed. In dry turning, Si3N4 (HMW) performs better with reduced flank wear by 13.85% than the Si3N4 (untreated) insert. Meanwhile, in MQL turning, the Si3N4 (HMW) had decreased flank wear by 30.53% when compared to the Si3N4 (untreated) insert. The surface roughness from MQL turning using the Si3N4 (HMW) was much lower (0.53m) than the Si3N4 (untreated) (0.85m). The Si3N4 (HMW) insert was found to be appropriate for MQL turning, but unsuitable for dry turning of Inconel 718 due to excessive tool wear.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Inconel 718 Silicon nitride inserts Hybrid microwave treatment MQL turning Dry turning
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN600 Metallurgy T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
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:	Dr. Tasnim Firdaus Ariff
Date Deposited:	30 Sep 2024 13:46
Last Modified:	30 Sep 2024 14:28
URI:	http://irep.iium.edu.my/id/eprint/114738

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