Effect of TiO₂ Nanofluid and Hybrid TiO₂ Nanofluid on Mechanical Properties of Steels for Automotive Applications

Abstract

Quenching is a process involving rapid cooling in quenching media and hardening of steels. The effect of quenching process on the microstructure and mechanical properties (hardness) are studied and elaborated in this thesis. The quenching media uses including conventional fluid (distilled water and mineral oil), nanofluid (TiO2 nanofluid), and hybrid-based nanofluid (TiO2 hybrid nanofluid). Thermal conductivity and microstructure development are closely-linked to each other. Conventional fluids as quenching media have low thermal conductivity thus limiting the development of desired microstructure in the steels. The thermal conductivity and stability of nanofluid and hybrid-based nanofluid are studied to enhance the thermal properties of the quenching media.

Effect of Multi-walled Carbon Nanotube and Polyethylene Glycol Addition in Nanofluid Quench Medium for Steel Heat Treatment Application

“…The extensive surface area in nanoparticles contributes to even higher conductivity. Therefore, nanofluid is commonly used in heat transfer-intensive processes, such as coolant systems (Septiadi et al, 2020), or quenching mediums in heat treatment (Radhiyah and Nurziela, 2020;Yahya et al, 2018;Babu, Arularasan, and Ramkumar, 2017).…”

Comparison of wet and dry milling on carbon biomass as dispersed particle in quench medium for steel heat treatment application

“…As a quench medium, the particledispersed liquid could have a controlled cooling rate for the different quenching applications. Several oxide particles, such as Fe 2 O 3 , SiO 2 , and TiO 2, have also been studied as dispersed particles in a quench medium [7][8][9][10][11].…”