Optimization of microstructural and mechanical properties of brass wire produced by friction stir extrusion using Taguchi method

Abstract

Friction stir back extrusion is used to produce brass wires from its chips, and then the process parameters are optimized using Taguchi L9 orthogonal design of experiments. The rotational speed, traverse speed, and the produced wire diameter are the parameters taken into consideration. The optimum process parameters are determined with respect to grain size, microhardness, and ultimate pressure strength of the produced samples. The predicted optimum values for output parameters are confirmed by conducting the confirmation test using optimum parameters. Analysis of variance shows that the rotational speed is the most dominant factor in determining the grain size and microhardness of the produced wires, and the tool traverse speed and the wire diameter are the second and the third effective parameters. However, in terms of the produced wires ultimate pressure strength, the traverse speed is the most dominant factor rather than the rotational speed. The optimum values for the rotational speed, the traverse speed, and the wire diameter are 500 r/min, 31.5 mm/min, and 6 mm, respectively, and the produced wire, by these optimum parameters, presents 14.17 µm, 127.1 HV, and 904.7 MPa for the grain size, the microhardness, and the ultimate pressure strength, respectively.

Friction extrusion of AZ91/bioactive glass gradient composite

“…Also, the eutectic structure was formed in some areas of the composite samples. The amount of β-Mg 17 Al 12 and α+β eutectic phases in the zone near the surface of the FE-processed samples was more than in the centre, which is attributable to the higher strain and heat generation during the FE process in the near-surface zone [34,35]. These factors promoted the dissolution of the β-Mg 17 Al 12 phase in the near-surface zone, leading to the formation of a solid solution.…”

Parametric analysis on drilling of aluminium alloy hybrid composites reinforced with SIC/WC

“…The significance of rate of feed on thrust force and roundness error was higher [34], roundness error and thrust force tends to increase with increasing rate of feed but surface roughness tends to reduce for 0.1 mm rev −1 and further rise to 0.15 mm rev −1 , surface roughness increases as more amount of material is removed. Drill speed influences thrust force [35] and roundness error [36]. With higher speeds, vibration takes places and hence increases the roundness error.…”

Wear performance of aluminium hybrid nanocomposites using Taguchi

“…Numerous studies have investigated the reinforcement of metal matrices with hybrid ceramic particulates, and the results have consistently demonstrated that this is an effective method to improve their mechanical and wear properties, such as tensile strength, hardness, and wear resistance. The tribological performance of hybrid metal matrix composites was investigated using the Taguchi methodology [32][33][34][35]. Examined how load, sliding speed, sliding distance, and the weight percentage of reinforcements impact dry sliding wear.…”