Title: Effect of rake surface textures spacing and width on the cutting performance of inserts in dry machining of titanium alloy

Authors: Amal S. Siju; Sachin D. Waigaonkar

Addresses: Department of Mechanical Engineering, BITS Pilani, K.K. Birla Goa Campus, Goa 403726, India ' Department of Mechanical Engineering, BITS Pilani, K.K. Birla Goa Campus, Goa 403726, India

Abstract: One of the crucial parameters that can be altered to improve machining efficiency in metal cutting is reducing the friction between tool and chip, especially along the rake surface of the tool. Studies have shown that many parameters of the micro or nanoscale texturing on the tool surface may influence its competence in reducing friction. However, the influence of texture parameters like width, spacing, etc. is not well understood, especially in the dry machining of hard alloys. In this experimental investigation, uncoated single point cutting tool inserts with different texture geometries on their rake surface were tested for adequacy in the typical turning operation of titanium alloy. The novelty of the study involves identifying the influence of texture spacing and width on the cutting parameters at different feeds in the dry machining of the Ti-6Al-4V alloy. The surface characterisation of the inserts shows how the textured surface was damaged under the machining regime. Chip morphology analysis was conducted to study the effect on chip thickness and shear plane angle. Inferences were made on the effect of texture dimensions on the frictional forces during machining.

Keywords: surface texturing; single point cutting tool; coefficient of friction; chip-morphology; machinability; Ti alloy.

DOI: 10.1504/IJMMM.2021.114015

International Journal of Machining and Machinability of Materials, 2021 Vol.23 No.2, pp.136 - 159

Received: 17 Apr 2020
Accepted: 03 Sep 2020

Published online: 18 Mar 2021 *

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