Texture Evolution in Severe Plastic Deformation by Equal Channel Angular Extrusion

2003 ◽  
Vol 5 (5) ◽  
pp. 308-316 ◽  
Author(s):  
L.S. Tóth
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Extrusion ◽  
Texture Evolution ◽  
Angular Extrusion

scholarly journals Semi-Continuous Equal-Channel Angular Extrusion and Rolling of AA5083 and AZ31 Alloys

Metals ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1035 ◽  
Author(s):  
Vladimir Segal ◽  
Svetlana V. Reznikov ◽  
Nagendra Murching ◽  
Vincent H. Hammond ◽  
Laszlo J. Kecskes
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Large Scale ◽  
Equal Channel Angular Extrusion ◽  
Solution Treatment ◽  
Structure And Properties ◽  
Structural Refinement ◽  
Angular Extrusion ◽  
Lightweight Alloys ◽  
Technical Basis

This paper describes a new modification of equal-channel angular extrusion for the “pass-by-pass” semi-continuous (sc-ECAE) processing of lightweight alloys. Sc-ECAE leads to a multifold increase in productivity and decrease in costs, providing a technical basis for the commercialization of severe plastic deformation (SPD) on a large scale with massive volume production. The evolution of the structure and properties are analyzed for an aluminum alloy (AA) 5083 and a magnesium alloy AZ31 as model materials representing, respectively, the structural refinement under severe plastic deformation (SPD) via strain-induced formation of new grain boundaries and via dynamic recrystallization. For the first alloy, the microstructure after sc-ECAE is formed via ultrafine sub-grains, which are further transformed into sub-micrometer grains during post-ECAE rolling. The preliminary solution treatment of AA5083 is an important stabilizing factor for the achievement of high mechanical properties. For the second alloy, optimized sc-ECAE results in a remarkable structural refinement, and a good balance of properties is obtained with a low number of passes. However, additional rolling in the latter case leads to a degradation of the structure and properties.

Models for severe plastic deformation by equal-channel angular extrusion

JOM ◽  
2004 ◽  
Vol 56 (10) ◽  
pp. 69-77 ◽  
Author(s):  
S. L. Semiatin ◽  
A. A. Salem ◽  
M. J. Saran
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Extrusion ◽  
Angular Extrusion

Evaluation of Reshaping Methods for Multi-Pass Equal Channel Angular Extrusion

2008 ◽  
Vol 584-586 ◽  
pp. 63-67
Author(s):  
D.C. Foley ◽  
R.E. Barber ◽  
J.T. Im ◽  
B. Onipede ◽  
K.T. Hartwig
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Deformation Process ◽  
Equal Channel Angular Extrusion ◽  
Processing Efficiency ◽  
Severe Plastic Deformation Process ◽  
Method Selection ◽  
Plastic Deformation Process ◽  
Angular Extrusion ◽  
Significant Step

Equal Channel Angular Extrusion is a widely adopted severe plastic deformation process capable of imparting large amounts of strain in a material via multiple passes through the die. In order to facilitate reinsertion of worked bars for multipass processing, reshaping is often required. Although this topic is rarely discussed in the literature, it is a significant step that can influence processing efficiency. This paper presents several reshaping options and makes recommendations for method selection based on the authors’ experiences with each.

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.

scholarly journals An Investigation on Microstructure, Texture and Mechanical Properties of AZ80 Mg Alloy Processed by Annular Channel Angular Extrusion

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1001 ◽  
Author(s):  
Xi Zhao ◽  
Shuchang Li ◽  
Yong Xue ◽  
Zhimin Zhang
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Texture Evolution ◽  
Boundary Migration ◽  
Annular Channel ◽  
Mg Alloy ◽  
Deformation Method ◽  
Single Pass ◽  
Angular Extrusion

Annular channel angular extrusion has been recently developed as a new single-pass severe plastic deformation method suitable for producing large size cup-shaped parts from cylindrical billets. In this study, the novel technology was successfully applied to commercial AZ80 Mg alloy at 300 °C, and microstructure, texture evolution, and mechanical properties were investigated. Due to severe shear deformation, the initial microstructure, including the coarse grains and large eutectic β-phases, was greatly refined. The strong basal texture formed during the initial deformation stage was modified into a weak tilted dynamic texture. During the deformation process, fine β-particles separated from eutectic phases effectively hindered the grain boundary migration and rotation, enhancing the grain refinement and texture weakening. More than 63% of the microhardness increase was achieved in this extruded part. Also, tensile tests showed the yield strength and elongation in both directions (transverse and longitudinal) of extruded part were improved more than 2.5 times, and the ultimate tensile strength was improved more than 2 times, compared to the initial material state. The improved material properties were mainly attributed to microstructure (grain and phase) refinement and texture weakening. It was demonstrated that the annular channel angular extrusion process can be considered as a novel and effective single-pass severe plastic deformation method.

scholarly journals Development of Microstructure and Fracture Toughness of AL-6063 Alloy Using Equal Channel Angular Extrusion

2014 ◽  
Vol 564 ◽  
pp. 488-494 ◽  
Author(s):  
J. Nemati ◽  
Shamsuddin Sulaiman ◽  
G.H. Majzoobi ◽  
Mohamed Ariff Azmah Hanim ◽  
B.T. Hang Tuah bin Baharudin
Keyword(s):  
Fracture Toughness ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Fracture Energy ◽  
Equal Channel Angular Extrusion ◽  
Average Diameter ◽  
Common Method ◽  
Charpy Test ◽  
Angular Extrusion ◽  
Extrusion Method

Severe plastic deformation (SPD) is one of the processes used to refine the microstructure of materials. Equal Channel Angular Extrusion (ECAE) is the most common method of SPD. In this study, AL-6063grain refinement was performed using the Equal Channel Angular Extrusion method. The material was extruded up to 6 passes at a temperature of 200°C following route A. A suitable die sets equipped with heating elements alongside a thermometer was employed with the intention of extruding the material. Between the two channels, there was an angle of 90°. The results showed that the material grain average diameter decreased from 45μm to 2.8 μm after 6 passes of the ECAE. The Charpy test was used for measuring the fracture energy of various samples. The fracture toughness was the function of this energy. According to this experiment, the fracture toughness rose as the number of the ECAE process elevated. Moreover, the toughness improved for 90% after 6 passes of the ECAE process.

A planar twist channel angular extrusion (PTCAE) as a novel severe plastic deformation method based on equal channel angular extrusion (ECAE) method

2013 ◽  
Vol 228 (12) ◽  
pp. 2246-2250 ◽  
Author(s):  
Mahmoud Shamsborhan ◽  
Ali Shokuhfar
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Extrusion ◽  
Pure Aluminum ◽  
Effective Strain ◽  
Processing Conditions ◽  
Deformation Method ◽  
Element Analysis ◽  
Ecap Process ◽  
Angular Extrusion

Planar twist channel angular extrusion (PTCAE) is a new severe plastic deformation method to produce bulk ultra-fine-grained materials which is based on conventional equal channel angular extrusion by applying additional planar twist strain in deformation zone of ECAP process and simultaneously imposing larger strain and increasing severe plastic deformation methods efficiency. Plastic deformation characteristics of PTCAE method were analyzed through finite element analysis using Deform 3D V.5 software, processing loads and values of effective strain in different directions of sample were studied for different planar twist angles (α) in comparison with the results of conventional ECAP with the same channel dimension and arc of curvature angles. Die and punch were assumed as rigid bodies, whereas the billet, with dimensions of 10 mm × 10 mm × 70 mm was considered to be deformable pure aluminum. The processing conditions such as friction coefficient, ram speed, mesh size and other factors were held constant to make comparison between the different processing conditions possible. The results indicated that more strain values with more uniform distribution may be achieved after PTCAE method in comparison with the conventional ECAP method. Also, it is observed that in α = 20, the equivalent strain distribution is homogenous approximately in both of vertical and horizontal directions of the cross-section of the sample. Therefore, PTCAE can be considered as a promising severe plastic deformation technique for future industrial applications which can be installed on any standard extrusion equipment without any additional required facilities that are essential in other new severe plastic deformation methods and can be used instead of ECAP process significantly and beneficially.

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