Investigations on Wear Behavior of Aluminium Composites at Elevated Temperature

Abstract

The aerospace aluminium alloy AA7050 was reinforced with Al2O3 of average particle size 5 m in this study using the stir casting method. To eliminate surface imperfections, AA7050/Al2O3 composites with varied weight percentages (0, 2, 4, 6) were manufactured, and wear tests on composites were carried out utilizing a pin-on-disc apparatus that varied load, velocity, temperature, and weight %. The tensile and hardness tests were carried out at a high temperature. The inclusion of particles enhances wear resistance by establishing a mechanically mixed layer (MML), according to the findings. The wear resistance at 300°C was 100% higher in comparison with resistance at 150°C. Because of the Orowan strengthening and Hall–Petch effect, the tensile strength and hardness of composites enhanced. Temperature, tracked by the weight % of strengthening powders, was the most important factor that influences the wear resistance of the composites. The findings showed that the material properties of AA7050/4wt%Al2O3 at 150°C and AA7050/2wt%Al2O3 at 300°C are superior than base alloy.

The Impact of nanoparticles (B4C-Al2O3) on mechanical, wear, fracture behavior and machining properties of formwork grade Al7075 composites

“…It was shown that as the ageing temperature increased, Ra decreased. The observed phenomenon can be explained by the decrease in frictional stress on micro MMCs and the decreasing tendency towards the formation of Built-Up Edges (BUEs) with increasing ageing temperatures [13]. Predominantly, samples that have been heat-treated had smoother surfaces than samples that had not, which are in line with research findings from other studies [14].…”

“…6. It has been observed that when the weight percentage of hard ceramic particles increases, the wear resistance of the MMCs also increases [13,14]. Nano particles in the metal matrix composites will greatly improve the wear resistance.…”

“…In Figs. 13 and 14, the experimental data points are plotted against the predicted values for Ra and machining force across each level of variables. These graphical representations enable a visual comparison between the observed results and the anticipated values, aiding in the assessment of the accuracy and effectiveness of the experimental procedures.…”

An intelligent fuzzy-particle swarm optimization supervisory-based control of robot manipulator for industrial welding applications

“…In robot manipulators, the PSO method improves the optimization control utilized to regulate the DC motor parameter 14 . The sophisticated technique PSO mutation algorithm is utilized to address the industrial robot handler optimization problem 15 , 16 . The reverse dynamic control of the robot manipulator using fuzzy and PSO controllers is presented for checking the optimum problem 17 , 18 .…”

Investigation on Wear Analysis of Aluminium (Al) 7075 Alloy Reinforced with Titanium Carbide (TiC) and Graphene (Gr) Nanoparticles

“…With the advancement in automotive and aerospace technology, the use of high-performance and lightweight structural components with the goal of lowering cost, energy consumption, and emissions is very difficult. But it can be achieved by using aluminium metal matrix nanocomposites that will be suitable for automotive and aerospace applications.Especially Al7075 reinforced with hybrid nano ceramic particles.It plays a vital role in development to satisfy modern industry and societal requirements [1], [2]. Because of their superior mechanical and wear properties over conventional materials, Al7075 metal matrix nanocomposites have created the interest of recent researchers in developing the required components in the automotive and aerospace fields.…”