Optimization of tribological behaviour of TiO₂ nanoparticles reinforced AA7178 alloy matrix using ANN and Taguchi’s methodology

Abstract

The investigation of tribological behaviour of AA7178 base alloy matrix reinforced with varying weight percentage of nano TiO2 particles (0,1,2 and 3%) using artificial neural network (ANN) and Taguchi is presented in this paper. Scanning electron microscope(SEM) with Energy Dispersive Spectroscopy (EDAX) was used to study the microstructural as well as wear behaviour of the nanocomposite. The SEM image confirms that abrasive and adhesive wear was responsible for worn-out surface. ANN with Taguchi model was used to obtained the best values for input process parameters (sliding speed, distance, load and weight percentage) to minimize the output values (Coefficient of friction and wear rate). Coefficient of friction and wear rate was mainly affected by weight percentage of nano TiO2 by 60.95% and 57.33% respectively. The efficiency of ANN model was better compared to Taguchi model.

Investigation on the Mechanical Properties of Powder Metallurgy-Manufactured AA7178/ZrSiO4 Nanocomposites

“…Te matrix material has been refned, leading to a denser composite. Compared to the HP method, which yielded composites with a density of 2.65 g/cm 3 (equal to 98%), the DPDS method yielded composites with a thickness of 2.6 g/cm 3 (equivalent to 93.5% of the theoretical value). When comparing AA7178-2.5 wt.…”

“…Close connections developed between the matrix and the scattered ZrSiO 4 nanoparticles, which helped to fne-tune the grain and boost the mechanical characteristics of the materials. Te mechanisms of grain refning, load transfer, and Orowan looping provide the basis of the reinforcement contributions [3,4]. ZrSiO 4 nanoparticles are often researched as reinforcing materials due to their higher effciency and simplicity of manufacture.…”

Optimization on the electrical discharge machining (EDM) process parameters of aged AA7075/TiC metal matrix composites

“…The stir casting technique is a very cheap and simple method for manufacturing aluminum alloys based composites (Pradhan et al, 2016;Sharma et al, 2020). Different hard reinforcements such as Silicon Carbide (SiC), Boron Carbide (B 4 C), Aluminum dioxide (Al 2 O 3 ), Titanium Boride (TiB 2 ), Titanium Carbide (TiC), Silicon Nitride (Si 3 N 4 ) Titanium dioxide (TiO 2 ) and Tungsten Carbide (WC) are widely employed for reinforcing aluminum alloys (Neuman et al, 2017;Meignanamoorthy et al, 2020;Bharat and Bose, 2022a). The aging process is needed for enhancing the hardness of the aluminum alloys for using in various applications.…”