Optimization of Turning Parameters for Zirconia-Toughened Alumina-Based Self-Lubricating Composite Cutting Tool Materials Using Grey Relational Approach

Pujari Srinivasa Rao; Bagadi Pradeep  Kumar; Dora Siva Prasad; Mathala Prithvi Raj; M.S.S. Srinivas Rao

doi:10.15282/ijame.22.3.2025.2.0959

Authors

Pujari Srinivasa Rao GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, 530045, Andhra Pradesh, India
Bagadi Pradeep Kumar GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, 530045, Andhra Pradesh, India
Dora Siva Prasad GITAM (Deemed to be University), Gandhi Nagar, Rushikonda, Visakhapatnam, 530045, Andhra Pradesh, India
Mathala Prithvi Raj Anil Neerukonda Institute of Technology & Sciences, Sangivalasa, Bheemunipatnam (Mandal), Visakhapatnam, 531162, Andhra Pradesh, India
M.S.S. Srinivas Rao Anil Neerukonda Institute of Technology & Sciences, Sangivalasa, Bheemunipatnam (Mandal), Visakhapatnam, 531162, Andhra Pradesh, India

DOI:

https://doi.org/10.15282/ijame.22.3.2025.2.0959

Keywords:

ZTA cutting tool, Coefficient of friction, Surface roughness, Grey relation analysis, Taguchi analysis

Abstract

Dry machining processes frequently encounter challenges, including increased cutting forces, high friction, and poor surface finishes, primarily due to the absence of lubrication. To address these issues, this study introduces the development of solid-lubricating cutting tools (SLTs) by incorporating elements such as Nichrome, silver, molybdenum, strontium sulfate, and calcium fluoride into a Zirconia Toughened Alumina matrix. The objective was to enhance the tribological performance of cutting tools for turning AISI 4340 steel under dry conditions. An experimental design based on the L8 mixed orthogonal array was employed, and the Grey-Taguchi analysis method was used to optimize multiple performance measures, including cutting forces, coefficient of friction, and surface roughness. Among the fabricated tools, SLT 4 exhibited superior performance. The results demonstrated a 73% reduction in cutting forces, a 45% decrease in the coefficient of friction, and a 66% improvement in surface finish compared to the unmodified base tool. These enhancements were attributed to the formation of a stable self-lubricating layer on the tool surface during machining. A confirmation experiment validated the optimization outcomes, confirming the effectiveness of the proposed tool composition.

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