Severe Plastic Deformation by Equal Channel Angular Swaging

2010 ◽  
Vol 667-669 ◽  
pp. 103-107 ◽  
Author(s):  
Enrico Bruder ◽  
Mehmet Okan Görtan ◽  
Peter Groche ◽  
Clemens Müller
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Shear Zones ◽  
Efficient Production ◽  
Forming Process ◽  
Rotary Swaging ◽  
Angular Pressing ◽  
Axial Forces ◽  
Plastic Deformation Process ◽  
Cost Efficient

Equal Channel Angular Swaging (ECAS) is a new severe plastic deformation process which combines the conventional equal channel angular pressing (ECAP) and the incremental bulk forming process rotary swaging. The tool system consists of two rotary swaging dies with an angled channel that contains four shear zones, generating severe plastic strain per pass. The crucial advantages compared to conventional ECAP are a significant reduction of friction and axial forces plus the potential to be extended to continuous processing. Thus, ECAS has high potential for a cost-efficient production of bulk UFG materials. In the present paper the principles of ECAS are introduced and first experimental results for the processing of copper are presented.

scholarly journals Aluminum based Composites by Severe Plastic Deformation Process as New Methods of Manufacturing Technology

2018 ◽  
Vol 218 ◽  
pp. 04011 ◽  
Author(s):  
Agus Pramono ◽  
Alry Mochtar Jamil ◽  
Anistasia Milandia
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Grain Morphology ◽  
Manufacturing Technology ◽  
Roll Forming ◽  
New Methods ◽  
Angular Pressing ◽  
Plastic Deformation Process ◽  
Metal And Alloys

Composites a material was developed to replace metal and alloys, because of the properties such as light weight and unique mechanical properties. Processing of aluminum-based composites has been developing by new manufacturing technology, namely severe plastic deformation (SPD), to produce unique of mechanical properties. Some of the methods used are; equal channel angular pressing (ECAP), accumulative roll bonding (ARB) and multi-axial forging (MAF). The results of some of these methods were compared with the latest method of new SPD, namely: repetitive press roll forming (RPRF). Based on grain morphology and mechanical properties, the result of RPRF has superior to another method. The properties produced by SPD technology was varies, the highest of hardness produced by RPRF process was 88 HV10, ECAP produced 65 HV10, MAF was 46 HV10 and ARB reached 50 HV10. While the highest of tensile strength produced by MAF was 237 MPa while the RPRF process just only around 147 MPa, but the ultrafine grains just only produced by RPRF method which is 0.9 μm, compared to other methods: MAF 1.2 μm, ECAP 5.7 μm and ARB is not so far with MAF that is equal to 1.4 μm. The RPRF process can be recommended for the interest of the aluminum-based composite materials processing industry. Because currently some component product by industries have been substituted from metal alloy materials to metal-based composites.

scholarly journals Development of Nanostructured AA3103 by Equal Channel Angular Pressing and Thermal Treatments

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
C. J. Luis ◽  
R. Luri ◽  
J. León ◽  
I. Puertas ◽  
D. Salcedo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Pressing ◽  
Thermal Treatments ◽  
Ecap Processing ◽  
Angular Pressing ◽  
Profound Knowledge ◽  
Plastic Deformation Process ◽  
Deformation Processes

This work presents a study related to the achievement of a nanometric structure in AA3103, employing severe plastic deformation processes (SPD), in this case equal channel angular pressing (ECAP). The changes in the mechanical properties and in the microstructure of AA3103 were studied after being processed by ECAP. Subsequently, scanning electron microscopy was used to determine the evolution of the microstructure after different thermal treatments on the material processed by this severe plastic deformation process. Furthermore, a more profound knowledge of the changes in the mechanical properties of this aluminium alloy was obtained. It was demonstrated that with different appropriate combinations of thermal treatments and ECAP processing, it is possible to significantly improve the mechanical properties through obtaining submicrometric grain size structures.

Effect of Severe Plastic Deformation on Structure and Properties of Beta Titanium Alloy Using for Hip Implants

2017 ◽  
Vol 891 ◽  
pp. 409-413
Author(s):  
Ladislav Kander ◽  
Miroslav Greger
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Titanium Alloy ◽  
Severe Plastic Deformation ◽  
Cast Alloy ◽  
Hip Implants ◽  
Beta Titanium Alloy ◽  
Angular Pressing ◽  
Beta Titanium ◽  
Plastic Deformation Process

The Paper Deals with Microstructural and Mechanical Properties Changes during Severe Plastic Deformation Process in Beta Titanium Alloy Used for Hip Implants. Effect of Various Numbers of Passes through ECAP (Equal Chanel Angular Pressing) Die on Microstructure and Properties Have been Evaluated. Comparison between Virgin State Cast Alloy and Alloy after Several Steps of Severe Plastic Deformation Induced by ECAP Technology Have been Carried out. Mechanical Properties Have been Evaluated Using Miniaturized Specimens. from Experimental Work can Be Concluded Positive Effect of ECAP Technology both on Mechanical Properties (yield Stress as well as Tensile Strength) Including Grain Size.

Determination of Mechanical Properties on Aluminium with 5% Copper Powder Metallurgy Route Compacts through Equal Channel Angular Pressing

2015 ◽  
Vol 813-814 ◽  
pp. 161-165
Author(s):  
M. Sadhasivam ◽  
T. Pravin ◽  
S. Raghuraman
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Grain Size ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Pressing ◽  
High Strength ◽  
Angular Pressing ◽  
Fine Grain ◽  
Plastic Deformation Process

The need for super-plasticity and high strength leads to the development of Severe Plastic Deformation technique. The strength of the material is directly dependent upon the grain size of the material. So, there is a need for producing Ultra-Fine Grain microstructure (UFG). UFG material is the material with very small grain size in the range of sub-micrometre. Application of severe plastic deformation, imparts extremely high strain. Equal channel angular pressing (ECAP) is a severe plastic deformation process in which the metal specimen is pressed through an angular channel of equal cross section. The material is subjected to shear deformation and strain is imparted in the specimen. Geometric parameters such as channel angle and corner angle play a major role in grain refinement. Aluminium (Al) specimens are subjected to undergo severe plastic deformation. Since, the strength of Al is not high, other materials are added in order to enhance its mechanical properties by matrix work hardening. Copper (Cu) along with Al shows increase in its strength and also in hardness. An attempt is made with Aluminium and copper, blended in the ratio 95:5 by weight with the main objective to study the Tensile strength, Hardness and Percentage Elongation properties of the specimen.

Severe Plastic Deformation of Commercially Pure Titanium by Rotary-Die Equal Channel Angular Pressing Method

2006 ◽  
Vol 503-504 ◽  
pp. 717-720
Author(s):  
Akira Watazu ◽  
Ichinori Shigematsu ◽  
Aibin Ma ◽  
Yoshinori Nishida ◽  
Yong Jai Kwon ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Pressing ◽  
Pure Titanium ◽  
Commercially Pure Titanium ◽  
Pressing Method ◽  
Fine Grained ◽  
Angular Pressing ◽  
Commercially Pure ◽  
Plastic Deformation Process

The commercially pure titanium cylindrical samples with a diameter of 11.5mm and a length of 24mm were processed by a new severe plastic deformation process, called the rotary-die equal channel angular pressing (RD-ECAP), under the condition of 773K, 2.4mm/s punch. By the RD-ECAP, ECAP processes of 1-4 passes were possible without sample removal and the temperature of cp-titanium could be simply controlled. After the RD-ECAP process, the cp-titanium samples had no crack. Fine-grained microstructures were observed in the sample on Y plane. Therefore the samples processed by RD-ECAP were expected to have high mechanical strength.

Equal Channel Angular Pressing and Torsion (ECAPT) for Densification and Strengthening Properties of Powder Sintered Materials

2010 ◽  
Vol 146-147 ◽  
pp. 101-104 ◽  
Author(s):  
Yong Zhi Li ◽  
Xiao Bo Bai ◽  
Yu Min Xie ◽  
Ke Min Xie
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Pressing ◽  
Full Density ◽  
Forming Process ◽  
Angular Pressing ◽  
Powder Sintering ◽  
Ultrafine Grained ◽  
Twist Extrusion ◽  
Sintered Materials

Severe Plastic Deformation（SPD）methods are hot research techniques of preparation of bulk ultrafine-grained materials and strengthening the material properties currently .Among the various SPD methods, ECAPT that a new method of ECAP （Equal channel angular pressing） organic integrates with TE（Twist extrusion）was key introduced for the frist time ,and experimental study on ECAPT technology for deformation and densification of pure Al and Mo powder sintered materials were carried out and the results were compared with that of ECAP in this paper.The results show that there have more effective and more stronger severe plastic deformation during the process of ECAPT and it improves the ability of material’s plastic deformation and strengthens the material properties.In forming process of ECAPT after three passes,the grain size of powder sintering reduces the average 200%, and there has its nearly full density and comprehensive performance materials to improve overall performance significantly.It is confirmed that there have better comprehensive mechanical properties of strengthening materials and more stronger severe plastic deformation during the process of ECAPT contrast to the ECAP, too.

Effect of Mo Addition to ZA22 Grain Refined by Ti and Ti-B on the Maximum Pressing Force and Consumed Work after Pressing by the Equal Channel Angular, ECAP, Process

2017 ◽  
Vol 735 ◽  
pp. 29-33
Author(s):  
Adnan I.O. Zaid
Keyword(s):  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Pressing ◽  
Deformation Process ◽  
Pressing Force ◽  
Severe Plastic Deformation Process ◽  
Angular Pressing ◽  
Ecap Process ◽  
Plastic Deformation Process

Equal channel angular pressing, ECAP, is relatively a recent severe plastic deformation process which is carried out on materials to grain refine their structure. In this paper, the effect of addition of Mo to ZA22 on the maximum pressing force and the work consumed after the ECAP process is investigated and the obtained results are presented and discussed.

Process Analysis and Numerical Simulation of Equal Channel Angular Pressing and Torsion (ECAPT)

2009 ◽  
Vol 79-82 ◽  
pp. 1229-1232 ◽  
Author(s):  
Yong Zhi Li ◽  
Ke Min Xue ◽  
Ping Li
Keyword(s):  
Numerical Simulation ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Equal Channel Angular Pressing ◽  
Process Analysis ◽  
Effective Strain ◽  
Horizontal Shear ◽  
Forming Process ◽  
Advantages And Disadvantages ◽  
Angular Pressing

Severe Plastic Deformation (SPD) methods are currently hot research techniques of preparation of bulk ultrafine-grained materials.Among the various SPD methods, ECAP (Equal Channel Angular Pressing) and TE (Twist Extrusion) have respective advantages and disadvantages and there have many questions in this research area at home and abroad although they are representative and rapidly developing and the promising ones.ECAPT, ECAP organic integrated with TE, was introduced for the frist time and the process principle and features were set forth in this study. The numerical simulation of the process was further analyzed with DEFORM-3D software.The results show that there have two main deformation zones in forming process of ECAPT during a single pass, and vertical and horizontal shear deformation have been taken place in workpiece and the value of effective strain is equivalent to accumulated deformation of ECAP and TE after one pass; And the peak and average value of effective strain when ECAPT are far greater than those of effective strain during the process of ECAP or TE. It is confirmed that there have more effective strain rate and more stronger severe plastic deformation during the process of ECAPT,and it improves the ability of material’s plastic deformation.

TECHNOLOGIES FOR MANUFACTURING NANOSTRUCTURED SURFACES

2020 ◽  
Author(s):  
Андрей Дмитриевич Бухтеев ◽  
Виктория Буянтуевна Бальжиева ◽  
Анна Романовна Тарасова ◽  
Фидан Гасанова ◽  
Светлана Викторовна Агасиева
Keyword(s):  
Plastic Deformation ◽  
Surface Modification ◽  
Severe Plastic Deformation ◽  
Pressing Pressure ◽  
Pressure Treatment ◽  
Structured Surfaces ◽  
Nanostructured Surfaces ◽  
Angular Pressing ◽  
Multilayer Composites ◽  
Compaction Of Powders

В данной статье рассматривается применение и технологии получения наноструктурированных поверхностей. Рассмотрены такие методы как компактирование порошков (изостатическое прессование, метод Гляйтера), интенсивная пластическая деформация (угловое кручение, равноканальное угловое прессование, обработка давлением многослойных композитов) и модификация поверхности (лазерная обработка, ионная бомбардировка). This article discusses the application and technology for obtaining nano-structured surfaces. Methods such as compaction of powders (isostatic pressing, Gleiter method), severe plastic deformation (angular torsion, equal-channel angular pressing, pressure treatment of multilayer composites) and surface modification (laser treatment, ion bombardment) are considered.

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