Roles of new bio-based nanolubricants towards eco-friendly and improved machinability of Inconel 718 alloys

The adverse effects of mineral oil-based metal cutting fluid on environmental sustainability have led to increased industrial concerns. Alternatively, biodegradable lubricants such as vegetable oil has a more positive impact with equivalent performance, but insufficient research on their benefits de...

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Bibliographic Details
Published in:Tribology international 2020-04, Vol.144, p.106106, Article 106106
Main Authors: Ali, Mohamed Asyraf Mahboob, Azmi, Azwan Iskandar, Murad, Muhamad Nasir, Zain, Mohd Zahiruddin Mohd, Khalil, Ahmad Nabil Mohd, Shuaib, Norshah Aizat
Format: Article
Language:English
Subjects:
Aluminum oxide
Bio-based nanolubrication
Biodegradability
Cutting energy
Cutting fluids
Cutting force
Inconel
Lubricants
Machinability
Machinability assessment
Machining
Metal cutting
Mineral oils
Nanoparticles
Nickel base alloys
Superalloys
Surface roughness
Tool life
Tool wear
Vegetable oils
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Summary:The adverse effects of mineral oil-based metal cutting fluid on environmental sustainability have led to increased industrial concerns. Alternatively, biodegradable lubricants such as vegetable oil has a more positive impact with equivalent performance, but insufficient research on their benefits demands further exploration. This work features extensive experimental investigations on machining of Inconel 718 using novel formulations of coconut bio-based oil with enhanced nanoparticles and coco-amido-propyl-betaine. Bio-based with 0.8 wt% of Al2O3 managed to minimise the rapid growth of tool wear and prolong the tool life by 40.17%. Conversely, bio-based with 0.5 wt% of Al2O3 yielded lower values of cutting force (64.32 N), spindle power (2070 kW), specific cutting energy (6.55 W/mm3), and surface roughness (0.29 μm). The outstanding performance of bio-based nanolubricants contributed to superior machinability efficiency and eco-friendly machining environments. •Machinability efficiency and sustainable machining environments with bio-based nanolubricants.•Dry, SolCut fluid, coconut oil, Al2O3 coconut oil nanofluid cutting with CAPB and SDBS.•Density, viscosity index, kinematic viscosity, and thermal conductivity of all the lubricants were measured prior to machining tests.•Coconut oil + 0.5 wt% of Al2O3 yielded improvement in machinability performances.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2019.106106