Article: Experimental investigation on the effect of process parameters on machinability and surface integrity during end milling of Mg-TiO2 nanocomposite Journal: International Journal of Materials and Product Technology (IJMPT) 2023 Vol.66 No.3/4 pp.312 - 327 Abstract: In this study, end milling experiment was performed on magnesium matrix nanocomposites with TiO2 proportion of 1.5, 2.5 and 5 wt. % respectively under dry condition using Ti-AlN coated tungsten carbide tool. The tomographs of the specimens revealed the fact that there was no significant agglomeration. Mg-5% TiO2 experienced better mechanical properties compared to that of other composite and pure Mg specimens. The microhardness and nanohardness was maximum for Mg-5% TiO2 of about 63.89 Hv and 1.24 GPa respectively. The irregular crystalline structure of hard ceramic TiO2 nanoparticulates and its bonding with the soft Mg matrix affected the machinability significantly. The maximum cutting force was observed for Mg-2.5% TiO2, which is in the range of 10 to 14 N, whereas the maximum cutting temperature of approximately 32°C was observed for Mg-5% TiO2. The interfacial bonding between TiO2 and Mg due to increase in concentration of TiO2 affects the machinability of nanocomposite to a greater extent than that of machining conditions. Ploughing phenomenon dominated at higher concentration of TiO2 which in turn affected the surface integrity of machined nanocomposites. Higher order of surface roughness was noticed for Mg-5% TiO2 of about 0.5 μm at spindle speed of 1,500 rpm. Inderscience Publishers - linking academia, business and industry through research

Title: Experimental investigation on the effect of process parameters on machinability and surface integrity during end milling of Mg-TiO₂ nanocomposite

Authors: Ganesh Radhakrishnan

Addresses: Mechanical & Industrial Section, University of Technology and Applied Sciences, Nizwa, Oman

Abstract: In this study, end milling experiment was performed on magnesium matrix nanocomposites with TiO₂ proportion of 1.5, 2.5 and 5 wt. % respectively under dry condition using Ti-AlN coated tungsten carbide tool. The tomographs of the specimens revealed the fact that there was no significant agglomeration. Mg-5% TiO₂ experienced better mechanical properties compared to that of other composite and pure Mg specimens. The microhardness and nanohardness was maximum for Mg-5% TiO₂ of about 63.89 Hv and 1.24 GPa respectively. The irregular crystalline structure of hard ceramic TiO₂ nanoparticulates and its bonding with the soft Mg matrix affected the machinability significantly. The maximum cutting force was observed for Mg-2.5% TiO₂, which is in the range of 10 to 14 N, whereas the maximum cutting temperature of approximately 32°C was observed for Mg-5% TiO₂. The interfacial bonding between TiO₂ and Mg due to increase in concentration of TiO₂ affects the machinability of nanocomposite to a greater extent than that of machining conditions. Ploughing phenomenon dominated at higher concentration of TiO₂ which in turn affected the surface integrity of machined nanocomposites. Higher order of surface roughness was noticed for Mg-5% TiO₂ of about 0.5 μm at spindle speed of 1,500 rpm.

Keywords: milling; machinability; powder metallurgy; microwave sintering; magnesium; nanocomposite; cutting force; cutting temperature; surface roughness.

DOI: 10.1504/IJMPT.2023.130207

International Journal of Materials and Product Technology, 2023 Vol.66 No.3/4, pp.312 - 327

Received: 16 Jan 2022
Accepted: 02 Aug 2022
Published online: 06 Apr 2023 *

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Title: Experimental investigation on the effect of process parameters on machinability and surface integrity during end milling of Mg-TiO2 nanocomposite

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Title: Experimental investigation on the effect of process parameters on machinability and surface integrity during end milling of Mg-TiO₂ nanocomposite