Title: Experimental investigation and multiobjective optimisation in abrasive waterjet machining by coupled fuzzy-AHP and fuzzy-TOPSIS

Authors: Paramjit Thakur; Pramod Maurya; Dadaro Niwrutti Raut; Mugdha Dongre

Addresses: Department of Mechanical Engineering, Saraswati College of Engineering, Mumbai, 400019, India ' Department of Production Engineering, Veermata Jijabai Technological Institute, Mumbai, India, 400019 ' Department of Production Engineering, Veermata Jijabai Technological Institute, Mumbai, India, 400019 ' Department of Production Engineering, Veermata Jijabai Technological Institute, Mumbai, India, 400019

Abstract: This work dealt with multi-objective optimisation in abrasive waterjet machining (AWJ) cutting of Ti6Al4V. The Taguchi L32 orthogonal array is used as an experimental design with pressure, abrasive flow rate, standoff distance, traverse rate, and abrasive size as control factors and depth of cut (DOC), kerf taper ratio (KTR), kerf width, material removal rate (MRR), and depth of smooth cutting zone as responses. The fuzzy-analytic hierarchy process (AHP) is used for weight calculation of responses, which is used by fuzzy-TOPSIS for combining all the responses into a single value. The optimal parameters from this work are as follows: Pressure (200 MPa), standoff distance (1 mm), abrasive flow rate (750 g/min), traverse rate (200 mm/min), and abrasive size (120#) The optimal parameters gave an improvement of 534 mm3/min in MRR, 1.38 mm in kerf width, 1.04 in KTR, 5.4 mm in the depth of the smooth zone, and 9.2 mm in the depth of the cut.

Keywords: AWJ; abrasive waterjet machining; multi objective; fuzzy analytic hierarchy process; Ti6Al4V.

DOI: 10.1504/IJCMSSE.2024.139013

International Journal of Computational Materials Science and Surface Engineering, 2024 Vol.12 No.1, pp.36 - 61

Received: 17 Aug 2023
Accepted: 27 Nov 2023
Published online: 07 Jun 2024 *

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