Investigation and optimization of multiple objectives by hybrid evolutionary algorithms for turning of Nimonic 80A under nano MQL environment

ABSTRACT

Nimonic80A is one of the hard-to-cut superalloy materials. However, machining the same remains difficult. The present study’s objective is attained by taking surface quality and tool wear as output core attributes of machining by deploying conventional statistical approaches and meta-heuristic optimisation algorithms to find optimal input attributes. Optimal input parameters were found using ANN hybridised with meta-heuristic optimisation algorithms, considering cutting acceleration as one of the response attributes along with cutting force (F_z), flank wear (V_b) and surface roughness (R_a). In this process, nanofluids were formulated by suspensions of graphene oxide into rice bran oil as the minimum quantity lubrication (MQL). Experiments were conducted based on L27 Taguchi experimental trials, and the experimental results revealed that minimum feed rate and cutting velocity reduced the cutting force, surface roughness, and tool flank wear up to 51% during nano-MQL turning conditions compared to dry machining. Thus, an artificial neural network (ANN) was used to generate the model for each machining response, which was further interfaced with multiobjective particle swarm optimisation (MOPSO) and multiobjective mayfly algorithms (MOMA) as a hybrid algorithm for finding optimal parameters. The optimal results were compared, and ANN-MOMA was found to be better.

KEYWORDS:

• Nimonic 80A
• nanofluids
• superalloy machining
• ANN modelling
• multiobjective optimisation

Nomenclature

CV	=	cutting velocity (m/min)
f	=	feed rate (mm/rev)
d	=	depth of cut (mm)
MQL	=	Minimum Quantity Lubrication
GO	=	Graphene Oxide
PVD	=	Physical Vapour Deposition
Fz	=	tangential cutting force (N)
az	=	Cutting acceleration (m/sec2)
Ra	=	surface roughness (µm)
Vb	=	flank wear (µm)
ANN	=	Artificial neural network
MOPSO	=	Multiobjective partial swarm optimisation
MOMA	=	Multiobjective mayfly algorithm

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The authors thank the Vellore Institute of Technology for providing “VIT SEED GRANT- SG20210179” for carrying out this research work.