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Improving the machining performance with bio-degradable coconut oil-assisted MQL turning of AISI-1040 steel: a sustainable machining approach

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Abstract

To counteract the adverse effects of mineral oil-based cutting fluids, manufacturing industries are aspire toward environment-friendly and less toxic cutting fluids. The biodegradability and non-toxic characteristics of vegetable oils make them an appropriate alternative to mineral oil-based cutting fluids. In this context, this research article presents the results of an experimental investigation carried out to improve the machining performance of AISI-1040 steel by utilizing coconut oil (CO) as a cutting fluid with minimum quantity lubrication and cooling (MQL) technique. A detailed investigation and analysis of tool flank wear, crater wear, cutting tool vibration, surface topography, cutting zone temperature, and chip morphology were performed under dry, flood, mineral oil with MQL (MQL-MO), and coconut oil with MQL (MQL-CO) cutting conditions. The findings of this investigation revealed that the MQL-CO is highly efficient in minimizing friction and heat dissipation. The tool wear was reduced by 52-58%, 33-37%, and 14-17% under MQL-CO as compared to dry, flood, and MQL-MO cutting conditions. In addition, the surface roughness values were reduced by 48%, 24%, and 22% and the cutting temperature was reduced by 40%, 22%, and 13% under MQL-CO than that of dry, flood, and MQL-MO cutting conditions. The MQL-CO cutting condition showed a considerable reduction in cutting tool vibration acceleration levels and a favorable chip morphology which improved the machining performance.

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The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.

Abbreviations

MQL:

Minimum quantity lubrication

CO:

Coconut oil

MO:

Mineral oil

AISI:

American Iron and Steel Institute

IR:

Infrared

θ w :

Wetting angle

Ra :

Average surface roughness

VB :

Flank wear

KT :

Crater wear depth

Qc-t :

Heat generated at chip-tool interface

Qw-t :

Heat generated at workpiece-tool interface

νc :

Cutting speed

f :

Feed rate

аp :

Depth of cut

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Saurabh Tiwari: conceptualization, methodology, investigation, writing-original draft, data curation.

Amarnath M: conceptualization, supervision, review and editing.

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Correspondence to Saurabh Tiwari or M Amarnath.

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Tiwari, S., Amarnath, M. Improving the machining performance with bio-degradable coconut oil-assisted MQL turning of AISI-1040 steel: a sustainable machining approach. Biomass Conv. Bioref. (2023). https://doi.org/10.1007/s13399-023-04573-3

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