Abstract
A ffecting factor of importance in industrial applications of Powder Metallurgy is a process of consolidation , t he fabrication process with the good parameters by increasing of the bond strength o n the surface to reduce the number of pores. In particular, methods of Severe Plastic Deformation (SPD) overcoming a number of difficulties associated with residual porosity in the sample which solidified. Ultrafine–Grained (UFG) materials processed by ECAP usually show unique mechanical properties such as; high yield stress at low strain hardening, good ductility on low temperatures and high strain-rate super-plasticity at high temperatures. Production of Al alloy growing rapidly, particularly in the automotive industry . Although high-strength aluminium alloys containing Mg and Si (6xxx series aluminium alloys) which are easily reached, for formability processes is not sufficient to be applied. Therefore, much research has focused on increasing the formability of these alloys through heat treatment. High strength aluminium alloy, such as alloy AA7XXX, which combines the power of high-density ratio with excellent mechanical properties, is widely used for aviation applications, superplastic forming into the high-volume fabrication of components in the automotive. Consumer products industry is currently limited because of the relatively low strain rate. AA6XXX are some of the alloys materials, mostly used currently covering the whole range of industry. Applications of AA6XXX easier to process than AA7XXX because of properties the material elasticity, AA7XXX tend to form internal cracks as a result of microsegregation. That way heat treatment is required to improve the properties of the material when it is processed by ECAP.
Highlights
Process of Powder Metallurgy (P/M) enables for fabrication of bulk materials of metal, composite or ceramic powders
RESULT AND DISCUSSION Application of AA6XXX for component spare parts: The ability of AA6XXX is determined by the application of formability, formability of ultra-fine-grained specimens processed by equal channel angular pressing (ECAP) processes measured by a compression test
AA7XXX has been widely used in commercial applications because it shows high strength and can be heated to a wide range of properties, but in practice constrained by microstructure [C.M Cepeda, 2010], making the ECAP process components with AA7XXX material is constrained by factors internal cracks, so in this case takes precision the process of associated with some of the parameters used in ECAP [L
Summary
Process of Powder Metallurgy (P/M) enables for fabrication of bulk materials of metal, composite or ceramic powders. The fabrication process with the right parameters is increasing of the bond strength of surface to reduce the number of pores [DVOŘÁK, 2010]. A significant increase in the strength of the aluminum-based alloy can be achieved through the establishment by ultrafine grained (UFG) using methods of equal channel angular pressing (ECAP) [A. UFG materials processed by ECAP usually show unique mechanical properties such as; high yield stress at low strain hardening, good ductility on low temperatures and high strain-rate superplasticity at high temperatures [R.Z. Valiev, 1991 And R.Z. Valiev, 1997]. Processing of plastic deformation method quite good for grain refinement of metallic materials, processed materials SPD does show the physical and mechanical properties that uniquely inherent in various materials UFG and a number of advantages over nanostructured materials produced by other methods through powder processing [Hyoung Seop Kim, 2004]
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