(ISSN: 2349-2082)

International Journal For Ignited Minds
 Published Article
Investigation of Superplastic Deformation of Aluminium, Copper and Inconel 718 for Aerospace Applications
Suhas V , B H Vasudeva Murthy and Mr. K. Chandrappa
In many engineering applications the selection of the materials for the structure and working aspects is carried out in consideration with the load and stability criteria in the operating condition. Many complex structures are needed for a general engineering applications and in particular aerospace applications needs the light weight and high strength materials having the capability of resistance against corrosion, creep due to high temperature applications. Many engineering materials are used for the structural and chemical stability when they are applied for very extreme conditions of temperature, toxic gases and erosion materials. Superplasticity and superplastic deformation is the process of obtaining maximum deformation prior to failure of the materials to failure of the materials. The superplastic deformation characters are obtained with suitable materials having higher rate of ductility with minimum fracture. Te superplastic behavior can be improved by ultra fine structure through ECAP (Equi Channel Angular Extrusion Process) and maintaining the temperature of 0.5 to 0.6 times the melting temperature of the materials. The scope of this project is with the selection of materials and geometrical shapes for very critical components. The project work comprises of the experimental study of the behavior of the materials under various conditions of temperature and other boundary conditions. For the analysis of plastic deformation, the tensile testing has been conducted for the calculations of percentage of elongation under normal conditions and high temperatures respectively. Different materials like Aluminium, Copper and Inconel 718 of different series are used for the percentage of elongation under particular conditions. The variations of microstructure due to plastic flow of the materials are studied using scanning electronic microscope (SEM). The experimental and theoretical values of superplastic deformation are analyzed.
Superplasticity, diffusion bonding, high temperature, hot press, tension test.
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