Simulation and analysis of isothermal forging of AA6063 obtained from material processed by equal channel angular pressing severe plastic deformation

Abstract

In this research study, a comparative examination on the mechanical properties of AA6063 has been carried out after having been processed by isothermal forging, using plane-shape dies and starting from different initial deformation states. It introduces the novelty of employing experimental data obtained from the isothermal forging so as to model the flow rules of AA6063 processed by equal channel angular pressing taking temperature into account and using artificial neural networks to this end. Subsequently, these flow rules are employed to model the behaviour of AA6063 by means of finite element simulation. Furthermore, a validation of the experimental results is made with those obtained from the simulations using the flow rules attained with the neural networks. It is shown that it is possible to achieve higher precision than with traditional fitting methods of flow rules. In addition, this study presents the novelty of carrying out a comparative study between different starting material states, prior to forging, including among these material previously processed by the severe plastic deformation process, which is referred to as equal channel angular pressing. Moreover, the experimental results obtained when processing the aluminium alloy by equal channel angular pressing are compared to those states, which correspond to the traditional way of working on aluminium alloys, which can be quenched and aged for the purpose of improving their mechanical properties.

Surface layer properties of ultrasonic impact–treated AA7075 aluminum alloy

“…To improve the strength of the aluminum, alloying and age-hardening were used as the main strengthening mechanisms. 1,2 In recent years, severe plastic deformation (SPD) processes such as equal channel angular pressing (ECAP) 3,4 and accumulative roll-bonding (ARB) 5 are used for improving the mechanical and functional properties of aluminum alloys. 6,7 In these processes, ultra-large plastic strain is introduced into a bulk metal in order to create ultra-fine grained metals.…”

Machinability of pure copper before and after processing by severe plastic deformation method

“…[18][19][20][21] So far, various SPD methods have been proposed for SPD that let a specimen plastically deformed with no considerable alteration in size and shape. 21,22 Two of the most successful are high-pressure torsion (HPT) and equal channel angular pressing (ECAP). 13,23 Other methods include multi-directional forging, 19 accumulative roll bonding, 24 equal channel forward extrusion, 12 constrained groove pressing, 25 twist extrusion, 26 planar twist channel angular extrusion, 27 etc.…”

Manufacturing and mechanical characterization of Mg-4Y-2Nd-0.4Zr-0.25La magnesium microtubes by combined severe plastic deformation process for biodegradable vascular stents

“…5,6,11 Using ultrafine-grained (UFG) materials can be considered as an alternative method of increasing both the mechanical properties and corrosion resistance of metallic materials such as aluminum and magnesium, which can be perfectly achieved by severe plastic deformation (SPD) techniques. 12–17 Recent studies revealed that mechanical properties of Mg alloy could be significantly improved by different SPD processes. 18–20 For example, Faraji et al 21 manufactured a UFG tube of AZ91 by tubular channel angular pressing (TCAP) and produced UFG bulk of AZ91 by accumulative back extrusion (ABE) 22 which resulted in superior mechanical and microstructural properties.…”