Finite Element Simulation of Die Design for Equal Channel Angular Extrusion Process of Pure Aluminum and its Experimental Investigation

2010 ◽  
Vol 146-147 ◽  
pp. 1737-1740
Author(s):  
Shu Bo Xu ◽  
Cai Nian Jing ◽  
Guo Cheng Ren ◽  
Guo Qun Zhao
Keyword(s):  
Equal Channel Angular Extrusion ◽  
Pure Aluminum ◽  
Extrusion Process ◽  
Systematic Investigation ◽  
General Consideration ◽  
Die Design ◽  
Stress Distributions ◽  
Ecap Process ◽  
Element Simulation ◽  
Angular Extrusion

equal channel angular extrusion/Pressing (ECAE, ECAP) has the capability of producing ultra-fined grain (UFG) materials bellow the dimension of 1 μm. At present, it is one of the most important methods to get bulk UFG materials. In this paper, a systematic investigation of ECAP process on the pure Aluminum and die design is performed by using numerical simulation. The stress distributions on the die were obtained, and general consideration of the die during the whole pressing process was given. it was found that the closer the die corner is, the higher stress value results can be acquired. And the effective stress concentration in ECAP die cavity corner. The extruding load fell rapidly when the angular angle increasing. The proposed method can serve as preconditions to analyze the abrasion and fatigue of ECA Pressing die.

Finite Element Simulation of Die Design for Warm Equal Channel Angular Extrusion Process of AZ31 Alloy and its Experimental Investigation

2010 ◽  
Vol 667-669 ◽  
pp. 75-79
Author(s):  
Shu Bo Xu ◽  
Cai Nian Jing ◽  
Guo Cheng Ren ◽  
Peng Liu
Keyword(s):  
Friction Factor ◽  
Effective Stress ◽  
Equal Channel Angular Extrusion ◽  
Az31 Alloy ◽  
Extrusion Process ◽  
Systematic Investigation ◽  
Die Design ◽  
Element Simulation ◽  
Angular Extrusion ◽  
Die Stress

In this paper, a systematic investigation of equal channel angular extrusion/Pressing (ECAE, ECAP) process on the AZ31 alloy and die design is performed by using numerical simulation. The stress distributions on the die were obtained, and general consideration of the die during the whole pressing process was given. The numerical results revealed that effective stress distribution at the corner of the cavity and the extruded load during extrusion processes was effect by channel angles and friction factor. From the simulations, it was found that the closer the die corner is, the higher stress value results can be acquired. And the effective stress concentration in ECAP die cavity corner. The extruding load fell rapidly when the angular angle increasing. With the increase of friction factor, extruding load also increased significantly. The proposed method can serve as preconditions to analyze the abrasion and fatigue of ECA Pressing die. Besides, this method also provides a feasible way for other die stress analysis.

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.

A New Low Friction Die Design for Equal Channel Angular Extrusion

2008 ◽  
Vol 367 ◽  
pp. 215-220
Author(s):  
Traian Canta ◽  
Dan Frunză ◽  
Eniko Szilagyi ◽  
Magdalena Lungu
Keyword(s):  
Equal Channel Angular Extrusion ◽  
Extrusion Process ◽  
Die Design ◽  
Micro Structure ◽  
Low Friction ◽  
Silver Alloy ◽  
Extrusion Dies ◽  
Two Samples ◽  
Angular Extrusion ◽  
Experimental Works

The paper presents the experimental results on an aluminum alloy and a silver alloy processed by equal channel angular extrusion in order to refine the grains. Two type of extrusion dies have been used for experimental works: one with fixed walls and the other one with movable walls in order to reduce the friction during extrusion process. The new concept of the die consists in simultaneously pressing of two samples in one entering channel with two opposite exit channels. The channel geometry, friction contact, strain rate, extrusion load and micro structure aspects are presented.

Design, Fabrication of Equal Channel Angular Extrusion Process and its Effect on Microstructure and Hardness of Al and Cu Alloys

2018 ◽  
Vol 71 (10) ◽  
pp. 2605-2614 ◽  
Author(s):  
Payank Patel ◽  
Mithun Mohanan ◽  
Vishwarajsinh Sarvaiya ◽  
Vidhi Acharya ◽  
Dilip Kumar Basa ◽  
...  
Keyword(s):  
Equal Channel Angular Extrusion ◽  
Extrusion Process ◽  
Cu Alloys ◽  
Angular Extrusion

Numerical Simulation of Al 6062 Alloy Deformation Behavior Using Equal Channel Angular Extrusion Process with Different Die Angles

2015 ◽  
Vol 813-814 ◽  
pp. 557-562
Author(s):  
Aitha Lavanya ◽  
Perumalla Janaki Ramulu ◽  
G. Sreekanth Kumar ◽  
P. Ramya Sree ◽  
Sirish Battacharya ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Metal Forming ◽  
Equal Channel Angular Extrusion ◽  
Frictional Coefficient ◽  
Maximum Load ◽  
Extrusion Process ◽  
Outer Corner ◽  
Cylindrical Billet ◽  
Angular Extrusion ◽  
Simulation Results

The equal channel angular extrusion (ECAE) is one of the most important methods used for bulk metal forming. In which die angles are the most importent parameter. This paper attempts to determine the effect of different die angles during ECAE process for 6062 aluminum alloy deformation. Numerical simulations are performed for ECAE process on cylindrical billet of 6062 aluminum alloy at a constant frictional coefficient (μ) of 0.08 and punch speed of 15 mm/sec. Die has made with inner corner angles of (φ) =105°, 115°, 125°and 135° by fixing the outer corner angle (ψ) of 6°, punch is designed with a radii (R) of 4.75mm and height of 50mm. From the simulation results, tha data has been obtained in the form of load stroke behavior, and energy consumend during the punch stoke. It is observed that the maximum load and more energy consumption during the process is noted for lower angle.

scholarly journals Enhancing the Hardness of Al 6063 Alloy Via Equal Channel Angular Extrusion Process

2019 ◽  
Vol 1378 ◽  
pp. 042102
Author(s):  
O. P Abioye ◽  
P. O Atanda ◽  
A. A Abioye ◽  
O. O Ajayi ◽  
E. T Akinlabi ◽  
...  
Keyword(s):  
Equal Channel Angular Extrusion ◽  
Extrusion Process ◽  
Angular Extrusion

The Die Design of Large Diameter Tee Multi-Pass Extrusion Process

2011 ◽  
Vol 194-196 ◽  
pp. 2199-2203
Author(s):  
Jian Zhang ◽  
Tan Li ◽  
Liang Chu ◽  
Da Sen Bi
Keyword(s):  
Large Diameter ◽  
Equivalent Stress ◽  
Extrusion Process ◽  
Equivalent Strain ◽  
Simulation Software ◽  
Die Design ◽  
State Variables ◽  
Element Simulation ◽  
Deformation Stress ◽  
First Contact

Finite element simulation software Deform-3D on large-diameter multi-pass three-way pipe to simulate the extrusion process, the equivalent stress, equivalent strain and load were analyzed. The simulation results show that with the increase of processing pass, deformation process becomes complex, forming more difficult, the value of the state variables are increasing; in the extrusion process, the mold first contact with the billet and extruded convex hull area of the site, compared to other regions, plastic deformation, stress concentration and large, with the mold closed, the force to uniform .The results are well shown that it could provide a theoretical basis to the practical industrial production.

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