Analysis response data (surface roughness) of turning titanium alloy with MQL and cryogenic coolants

Ibrahim, Ikhwan Nasir (2025) Analysis response data (surface roughness) of turning titanium alloy with MQL and cryogenic coolants. Masters thesis, Universiti Teknikal Malaysia Melaka.

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Abstract

Titanium alloys are valued for their exceptional strength-to-weight ratio, which remains stable even at high temperatures. In the aerospace industry, when manufacturing critical structural components to ensure high reliability, surface roughness plays a key role in assessing the quality of the finished machined surfaces. Titanium alloys are known for their excellent mechanical properties, but their machinability is challenging due to poor thermal conductivity and rapid tool wear. Advanced cooling techniques like MQL and cryogenic cooling offer potential solutions to these issues. This project compares the influence of Minimum Quantity Lubrication (MQL) and cryogenic C02 cooling together with cutting parameter contribution on the surface roughness of titanium alloy (Ti-6Al-4V ELI) during the turning process. The study involved conducting experiments on titanium alloy (Ti-6Al- 4V ELI) cylindrical bar using CNC lathe with uncoated carbide insert by varying cutting speeds, feed rates, and depths of cut. Surface roughness measurements were taken in real time using a portable surface roughness tester. The experimental design followed the Response Surface Methodology (RSM) using Box-Behnken by Design Expert 6.0.8 software, which enabled to determine the significant factors onto the output. The results demonstrated that MQL consistently provided superior surface quality under most machining conditions and feed rate emerged as the most critical factor with lower feed rates producing better surface finishes. This research underscores the importance of adopting advanced cooling techniques in machining processes, particularly for aerospace and biomedical applications where precision and surface integrity are critical.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Surface roughness, Titanium alloys, Manufacturing processes
Divisions:	Library > Tesis > FTKIP
Depositing User:	Norhairol Khalid
Date Deposited:	18 Aug 2026 08:27
Last Modified:	18 Aug 2026 08:27
URI:	http://eprints.utem.edu.my/id/eprint/30368
Statistic Details:	View Download Statistic

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