Development and characterization of co extruded al ti bimetal macro composite

Abstract

The aluminium composites are engaged in most of the aerospace newlineand automobile applications. To improve the survival of aluminium in newlineextreme environment such as nose, wings, and floors of aircraft improved newlineproperties are essential. In this current study, two different material with newlinedifferent properties are joined together to form a new bimetallic material. newlineSofter Al-6061 is used as sleeve and grade II Ti is used as core were prepared newlinethrough the co-extrusion process at a temperature of 400°C with the ratios of newline2:1 and 2:0.5. Taguchi technique is adopted to verify the optimized process newlineparameters of the co-extrusion process and found the most influencing factor newlinefor the hardness improvement. The fabricated macro composites are newlinecharacterized, and mechanical and tribological properties are analyzed. The newlineSEM is used to analyze the bonding characteristics of the materials. The newlineproperties such as resistance to point load and the bimetal composite tensile newlinestrength are tested using the hardness tester and UTM. The corrosion behavior newlineof the composite is tested using a polarization test. The development of the newlinediffusion layer is observed at the boundary of Al-Ti material, and the bonding newlineis improved. Compared to aluminium alloy and 2:1 bimetal composite, the newlineco-extruded Al-Ti with the ratio of 2:0.5 bimetal composite ratio shows better newlinemicrostructure and mechanical and tribological properties. It is concluded that newlinethe co-extrusion of Ti in Al is an efficient way to devise the new composites newlinewith prominent mechanical and tribological properties. The axial (tensile) newlinestrength of the sample 2 materials is improved to 17 % and 23 %, newlinerespectively. Optimization of process parameters of the extrusion process is newlinecarried out to improve the hardness of the extruded material. The selected newlinevariables are temperature, time, and pressure. Based on the design of newlineexperiments, the orthogonal array is developed and analyzed. The results are newlinecompared with the experimented and predicted value. The confirmation test newlinewas conducted and obtained a har