Experimental and FEM Analysis of the AA 6082 Processed by Equal Channel Angular Extrusion

2011 ◽  
Vol 478 ◽  
pp. 46-53 ◽  
Author(s):  
Javier León ◽  
C.J. Luis-Pérez ◽  
Daniel Salcedo ◽  
Ivan Pérez ◽  
Juan Pablo Fuertes ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Equal Channel Angular Extrusion ◽  
High Pressure Torsion ◽  
Fem Analysis ◽  
Fem Simulations ◽  
Roll Bonding ◽  
Angular Extrusion ◽  
Deformation Processes ◽  
Made In

Recent studies have shown that severe plastic deformation processes (SPD) improve the mechanical properties of the processed parts. Some of the most outstanding SPD processes are as follows: High Pressure Torsion (HPT), Repetitive Corrugation and Straightening (RCS), Cyclic Extrusion Compression (CEC), Accumulative Roll Bonding (ARB), Conform and Continuous Combined Drawing and Rolling (CCDR), among others, but the most well-known is Equal Channel Angular Extrusion or Pressure (ECAE/ECAP). The aim of these processes is to introduce high values of deformation inside the parts in order to reduce the grain size and thus to improve the mechanical properties of the starting material. The study of the damage imparted to an AA-6082 alloy is made in the present work. This alloy is received as cast and it is quenched at a temperature of 530 °C during 4 hours in order to be processed by ECAE at room temperature using different geometries of the dies. The imparted damage is also studied by using FEM simulations.

Comparison between FEM and Experimental Results in the Upsetting of Nano-Structured Materials

2012 ◽  
Vol 713 ◽  
pp. 31-36 ◽  
Author(s):  
C.J. Luis-Pérez ◽  
Ignacio Puertas ◽  
Daniel Salcedo ◽  
Javier León ◽  
Ivan Pérez
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
High Pressure ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Extrusion ◽  
High Pressure Torsion ◽  
Experimental Results ◽  
Structured Materials ◽  
Angular Extrusion ◽  
Deformation Processes

Over recent years, some severe plastic deformation processes have been developed with the aim of obtaining a material with sub-micrometric or even nanometric grain size, such as: ECAE (Equal channel angular extrusion) and HPT (High pressure torsion) among many others. The main aim of this present study is to analyse the upsetting of the 5083 Al-Mg-Mn alloy, which had been previously deformed by ECAE. Different processing temperatures will be used and the final properties of the resulting material will be determined.

Features of Twist Extrusion: Method, Structures & Material Properties

2006 ◽  
Vol 114 ◽  
pp. 69-78 ◽  
Author(s):  
Yan Beygelzimer ◽  
Dmitry Orlov ◽  
Alexander Korshunov ◽  
Sergey Synkov ◽  
Viktor Varyukhin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Equal Channel Angular Extrusion ◽  
High Pressure Torsion ◽  
Roll Bonding ◽  
Fine Grained ◽  
New Methods ◽  
Average Grain Size ◽  
Twist Extrusion ◽  
3D Deformation ◽  
Extrusion Method

During the last decade it has been shown that severe plastic deformation (SPD) is a very effective for obtaining ultra-fine grained (UFG) and nanostructured materials. The basic SPD methods are High Pressure Torsion (HPT) and Equal Channel Angular Extrusion (ECAE). Recently several new methods have been developed: 3D deformation, Accumulative Roll Bonding, Constrained Groove Pressing, Repetitive Corrugation and Straightening, Twist Extrusion (TE), etc. In this paper the twist extrusion method is analyzed in terms of SPD processing and the essential features from the “scientific” and “technological” viewpoint are compared with other SPD techniques. Results for commercial, 99.9 wt.% purity, copper processed by TE are reported to show the effectiveness of the method. UFG structure with an average grain size of ~0.3 μm was produced in Cu billets by TE processing. The mechanical properties in copper billets are near their saturation after two TE passes through a 60º die. Subsequent processing improves homogeneity and eliminates anisotropy. The homogeneity of strength for Cu after TE is lower than after ECAE by route BC, but higher than after ECAE by route C. The homogeneity in ductility characteristics was of almost of inverse character. The comparison of mechanical properties inhomogeneity in Cu after TE and ECAE suggests that alternate processing by ECAE and TE should give the most uniform properties.

Mechanical Properties of Equal-Channel Angular Extrusion-Processed Al-20Zn Alloy

2012 ◽  
Vol 445 ◽  
pp. 195-200
Author(s):  
Murat Aydin ◽  
Yakup Heyal
Keyword(s):  
Mechanical Properties ◽  
Impact Toughness ◽  
Equal Channel Angular Extrusion ◽  
Considerable Change ◽  
Fatigue Properties ◽  
Dendritic Microstructure ◽  
Two Phase ◽  
Angular Extrusion ◽  
Alloy Increase ◽  
The Impact

The mechanical properties mainly tensile properties, impact toughness and high-cycle fatigue properties, of two-phase Al-20Zn alloy subjected to severe plastic deformation (SPD) via equal-channel angular extrusion (ECAE) using route A up to 2 passes were studied. The ECAE almost completely eliminated as-cast dendritic microstructure including casting defects such as micro porosities. A refined microstructure consisting of elongated micro constituents, α and α+η eutectic phases, formed after ECAE via route A. As a result of this microstructural change, mechanical properties mainly the impact toughness and fatigue performance of the as-cast Al-20Zn alloy increased significantly through the ECAE. The rates of increase in fatigue endurance limit are approximately 74 % after one pass and 89 % after two passes while the increase in impact toughness is 122 %. Also the yield and tensile strengths of the alloy increase with ECAE. However, no considerable change occurred in hardness and percentage elongation of the alloy. It was also observed that the ECAE changed the nature of the fatigue fracture characteristics of the as-cast Al-20Zn alloy.

Mechanical properties and microstructure of AA1050 after ECAE (Equal Channel Angular Extrusion)

2010 ◽  
Author(s):  
K. J. Kim ◽  
D. Y. Yang ◽  
J. W. Yoon ◽  
F. Barlat ◽  
Y. H. Moon ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Equal Channel Angular Extrusion ◽  
Angular Extrusion

Microstructure and Mechanical Properties Resulting from Conventional Cold Extrusion of Equal Channel Angular Extruded Aluminium Alloy AA6101

2006 ◽  
Vol 503-504 ◽  
pp. 287-292 ◽  
Author(s):  
D. Nagarajan ◽  
Chakkingal Uday ◽  
P. Venugopal
Keyword(s):  
Mechanical Properties ◽  
Equal Channel Angular Extrusion ◽  
Industrial Applications ◽  
Cold Extrusion ◽  
Fine Grained ◽  
Microstructure Evaluation ◽  
Microstructure And Mechanical Properties ◽  
Processing Step ◽  
Deformation Processes ◽  
Extruded Aluminium Alloy

Severe plastic deformation processes like equal channel angular extrusion (ECAE) have been widely investigated for their ability to produce nano/ ultra fine-grained microstructures. It is well known that submicron sized grains/ sub grains can be produced in most Al alloys using this technique. However, industrial applications of ECAE will depend heavily on the advantages conferred by this process when it is used as an intermediate processing step prior to conventional forming. In the current investigation, the influence of pre processing by ECAE on subsequent post processing by conventional cold extrusion has been investigated. ECAE extrusion was carried out on cylindrical specimens of AA 6101 using an ECAE die with a die angle of 120 degrees. Extrusion was carried out for three passes using two different processing routes. The ECA extruded specimens were subsequently subjected to conventional cold extrusion. The differences in extrusion pressures, which have a strong influence on industrial applications, were noted. Changes in microstructure and mechanical properties were also determined. The obtained results of mechanical properties and microstructure evaluation show that for high strains (strain ε ≈ 2.01), ECAE through some processing routes can be effectively used as an intermediate processing step prior to conventional cold extrusion to obtain a product with enhanced mechanical properties.

Mechanical properties and stress distribution in aluminium 6063 extrudates processed by equal channel angular extrusion technique

2021 ◽  
pp. 1-9
Author(s):  
Temitayo Mufutau Azeez ◽  
Lateef Owolabi Mudashiru ◽  
Tesleem Babatunde Asafa ◽  
Adekunle Akanni Adeleke ◽  
Adeyinka Sikiru Yusuff ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stress Distribution ◽  
Equal Channel Angular Extrusion ◽  
Angular Extrusion
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