Effect of tin content and ecap passes on the mechanical. Equal channel angular pressing ecap is a processing method in which a metal is subjected to an intense plastic straining through simple shear without any corresponding change in the crosssectional dimensions of the sample. Analysis of equal channel angular extrusion by upper bound. This book presents the most recent results in the area of bulk nanostructured materials and new trends in their severe plastic deformation spd processing, where these techniques are now emerging from the domain of laboratoryscale research into the commercial production of various bulk nanomaterials. Some problems of ecap of ultrafine steel and its future directions are indicated. The equal channel angular extrusion ecae is a well known method for production of bulk materials with ultra fine grained structure14.
Achieving excellent ductility in highstrength mg10. Pdf deformation heterogeneities in equal channel angular. Equal channel angular pressing technique for the formation of. We will create a input type element that will take source path of pdf file and display into div container.
Computational analysis of equal channel angular pressing. Equal channel angular pressing technology is the latest technical method of producing ultrafine grain metal materials. Influence of annealing on ductility of ultrafinegrained titanium processed by equalchannel angular pressingconform and drawing volume 3 issue 4 alexander v. Equal channel angular pressing ecap developed by segal et al. Equalchannel angular pressing ecap is a processing method in which a metal is subjected to intense plastic straining through simple shear without any corresponding change in the crosssectional dimensions of the sample 12. Equalchannel angular pressing as a new processing to control. Equal channel angular pressing of alsic composites. Equal channel angular pressing ecap is a convenient processing tool for introducing very significant grain refinement, typically to the submicrometer level, in a wide range of metals. Add the sample pdf file name in the assets section of the. Equalchannel angular pressing is an effective tool for attaining ultrafine grain sizes in bulk materials. One of the most applied severe plastic deformation processes is ecap equalchannel angular pressing which is suitable to produce ultrafinegrained metallic materials with high mechanical performance. In present study, equal channel angular pressing ecap of a quenched commercially pure titanium cpti grade 2 has been successfully performed at 723 k with an imposed equivalent normal strain of about. Some samples were tested in this condition ufg1 and others were annealed for 1 h at 623 k ufg2.
Abstract ultrafine grained materials have been widely investigated due to their improved mechanical properties such as high strength and ductility. The results show that ecap at room temperature and annealing at 350. Pdf equal channel angular pressing of al alloy aa2219. As a result, the ufg steels exhibited superior mechanical properties, such as high strength and some.
Microstructure and mechanical properties of highnitrogen. Tensile properties and dislocation strengthening of cpti. Equal channel angular pressing how is equal channel angular. Effect of mechanical alloying and equal channel angular extrusion consolidation on the structure and properties of tungsten carbidecobalt alloy. As your link does not contain any angularspecific statements like e. Using equalchannel angular pressing for refining grain. Tensile tests at a constant crosshead speed of 0,016 mms until failure were carried out. Equalchannel angular pressing and creep in ultrafinegrained. Threedimensional orientation image maps oim were obtained by ebsd after ecap are shown in.
Horn design for ultrasonic vibrationaided equal channel angular pressing r. Commercially pure titanium was selected for the study. Using examples of consolidation of al particles by back pressure equal channel angular pressing, it is demonstrated that full consolidation is achieved when the particles are sheared to disrupt the surface oxide layer whereas. Horn design for ultrasonic vibrationaided equal channel. It is a web standards based platform for parsing and rendering pdfs. Equal channel angular pressing technique for the formation. Equal channel angular extrusion ecae is one technique from the severe plastic deformation spd group, aimed at producing ultra fine grained ufg material. C can be used as a technology of reducing wear in friction sliding. The foils produced from rolling the ufg ti exhibit a homogeneous nanostructure, while foils produced from rolling the coarsegrained ti exhibit heterogeneous. The effect of ball milling and equal channel angular pressing on hydrogen absorptiondesorption properties of mg4.
Equal channel angular pressing ecap is a severe plastic deformation spd technique leading to refinement of the grain size of materials to submicron or even nanosize length scales. When i click the download link, it opens the browsers default download dialog. Equi channel angular pressing also known as ecap is one of the most efficient process to impart high strength, hardness and toughness to the materials without changing its dimension by refinement of grains. Uniaxial compressive behavior of equal channel angular. Proceedings of the asme 2010 international mechanical engineering congress and exposition. Nov 18, 20 by using equal channel angular pressing ecap technique, one of the severe plastic deformation methods, it is possible to obtain ultrafinegrained microstructures. We processed coarsegrained ti and equalchannel angular pressing ecap processed ultrafinegrained ufg ti into 20. In the present study, the suitability of this technique for the processing of tubular specimens has been investigated. Equal channel angular pressing ecap is a representative severe plastic deformation process to fabricate bulk nanostructured materials by repetitive passes. Because of their high internal energy, ufg materials are known to have microstructures which are susceptible to undesirable changes at low temperatures. Pressing may be conducted using a square configuration as in fig. Chiu1 1 school of metallurgy and materials, university of birmingham, edgbaston, birmingham, b15 2tt, uk 2 department of materials, loughborough university, le11 3tu, uk corresponding author.
The uniqueness of ecap is that fine grains are obtained without changing any of the dimensions of the sample. Up to date, this method has been successfully used to produce several ultra. Fragmentation of mg24y5 intermetallic particles in an mg. Jun 19, 2016 the effect of ball milling and equal channel angular pressing on hydrogen absorptiondesorption properties of mg4. However, industrial production of these materials is lagging behind because of the lack of industrially viable severe plastic deformation processes. The simulation process was done for al 5083 alloy using deform 3d software at two different channel angles 90 0 and 120 0 and with two distinct routes a and c. Typically, there are four basic processing routes for the repetitive passes. The development of processing using equalchannel angular pressing. Alsic p composites were subjected to severe plastic deformation through equal channel angular pressing ecap. Equal channel angular pressing technique for the formation of ultrafine grained structures article pdf available in south african journal of science 108910. Principle of equalchannel angular pressing for the. Free fulltext pdf articles from hundreds of disciplines, all in one place ultrafinegrained plates of almgsi alloy obtained by incremental equal channel angular pressing. Pdf equal channel angular pressing of tubular samples.
Among the above mentioned processes, equalchannel angular pressing is an attractive processing technique. In industrial metalworking, it is an extrusion process, the technique is able to refine the microstructure of metals and alloys. This is onother pdf viewer tutorial, i am creating simple angular 4 tutorial that will display pdf using ng2 pdf viewer libs. Of a wide diversity of new spd procedures, equal channel angular pressing ecap is an especially attractive processing technique. The process of equalchannel angular pressing ecap, known also as equalchannel angular extrusion ecae, was first introduced by segal and his coworkers in the 1970s and 1980s at an institute in minsk in the former soviet union. Microstructural development of fe20mass%cr alloys and pure. Despite the simple design of ecae tool, the homogeneity of material flow, needed pressure and resulting strains are strongly influenced by a number of process parameters like tool geometry, external. It is found that the optimum condition in ucaped alloy is obtained at 523 k with a larg. Also, the effect of the formation of this dislocation structure on deformation and fracture behavior is examined. Effects of strain hardenability and strainrate sensitivity on the plastic flow and deformation homogeneity during equal channel angular pressing volume 16 issue 3 hyoung seop kim, sun ig hong, min hong seo. Microstructure and mechanical properties pdf paperity.
The model employed to simulate the pressing for two consecutive passes. The thesis consist of a general introduction to equal channel angular pressing ecap, aluminium alloys and deformation mechanisms, followed by a detailed strain analysis of ecaped materials, mechanical properties and finally a study of the microstructural and textural development resulting from equal channel angular pressing. The microstructure and mechanical properties were studied. Basically im sending a getrequest in order to get the file stream no link. Add tags for texture and microstructure development of the silicon containing magnesium alloys after equal channel angular pressing. Finite element simulation of equal channel angular pressing. The principles of the ecap process are examined with reference to the. To achieve homogenous microstructure, each billet was pressed 8 times using the pressing route bc. Equal channel angular pressing of al alloy aa2219 article pdf available in advanced materials research 67. Aluminium metal matrix composites were processed by stir casting technique with commercially pure aluminium as the matrix material and 5, 10 vol.
The process of grain refinement under severe plastic deformation was examined in an al5. For ultrafine grained materials containing microstructures of 100300 nm to be manufactured and used in industry, machining research is needed to form and shape these materials into their final dimensions. The equal channel angular pressing ecap process is a promising technique for imparting a large plastic deformation to materials without a resultant decrease in cross sectional area. But the conventional ecap process gives drawbacks like buckling of extruding ram and surface defects. Dislocation structure and deformation in iron processed by. Equal channel angular pressing ecap linkedin slideshare. Effect of equal channel angular pressing on az31 wrought magnesium alloys by avvari muralidhar, s. Pdf mechanical and corrosion properties of az31 mg alloy. Microstructure and mechanical properties of medical magnesium. Circumferential twisting during route b equalchannel angular.
Effects of strain hardenability and strainrate sensitivity. An important advantage of this technique over conventional metalworking processes, such as extrusion and rolling, is that very high strains may be attained without any concomitant change in the crosssectional dimensions of the sample. An interesting thing about angular is that uploading files is barely handled by anyone. How to open a pdf file in angularjs stack overflow. A new flow line function for modeling material trajectory. Results indicated that as cast alsic composites can be successfully fabricated via a cheap conventional stir casting method, giving fairly dispersed sic particle distribution and having low porosity levels equal channel angular pressing ecap is a severe plastic deformation spd technique leading to refinement of the grain size of materials to submicron or even nanosize length scales.
Equalchannel angular pressing as a new processing to. A new unequal channel angular pressing ucap procedure is proposed for ultrafinegrained metals and alloys. Equal channel angular pressing ecap is a materials processing method that allows very high strains to be imposed, leading to extreme work hardening and microstructure refinement. Creating a small amount of ultrafine grained metals by severe plastic deformation, for example using equal channel angular pressing, is possible in many research laboratories.
Microstructural stability of a niobium single crystal. Equal channel angular pressing as a new processing to control the microstructure and texture of metallic sheets 603. Principles of equalchannel angular pressing as a processing. A grade 4 titanium was processed by equalchannel angular pressing ecapconform and drawing to produce an ultrafine grain ufg size of 180 nm. I set up a quick example in plunker that uses pretty much your code. Texture and microstructure development of the silicon.
A 211oriented niobium single crystal was deformed by equal channel angular pressing ecap at room temperature using the route b c to a total strain of 9. Microstructures by optical microscopy after final annealing showing partially and fully recrystallised states in a conventional and b ecap processes. Ultrafinegrained plates of almgsi alloy obtained by. A sharp cube texture develops after ecap processing. The process has attracted considerable interest as a method to refine microstructure by deformation processing. Issagulova faculty of nanotechnology and metallurgy, karaganda state technical university, karaganda. Low carbon steel processed by equal channel angular warm pressing specimens were cut off from the ecap aspressed billets with gauge length of 20 mm and the gauge portion equal to 3 mm was lying parallel to the direction of pressing. Incremental equal channel angular pressing for grain. The microstructures and mechanical properties of mg5. The results show that intensive dislocation cell blocks are present after one pass and even more after subsequent pressings. It is apparent that grains are more finely subdivided in fecr alloys than pure copper after the first pressing in spite that the former material has larger grain size before ecap. Equalchannel angular pressing ecap was applied to polycrystalline nial at temperatures around the brittletoductile transition temperature bdtt. This procedure may be used to introduce an ultrafine grain size into polycrystalline materials. Except equal channel angular pressing ecap all other methods are restricted either by the amount of strain they can impart or by the size quantity of material they can process produce.
Angularjs download pdf file using anchor tag in angularjs. The evolution of dislocation structure in pure fe during equalchannelangular pressing ecap is investigated. Results indicated that as cast alsic composites can be successfully fabricated via a cheap conventional stir casting method, giving fairly dispersed sic particle distribution and having low porosity levels ecap. The process of equal channel angular pressing ecap, known also as equal channel angular extrusion ecae, was first introduced by segal and his coworkers in the 1970s and 1980s at an institute in minsk in the former soviet union. Principle of equal channel angular pressing where is the angle of intersection of the two channels and t is the angle subtended by the arc of curvature at the point of intersection. Accepted manuscript 1 fragmentation of mg 24 y 5 intermetallic particles in an mgzny alloy during the equal channel angular pressing j. Equalchannel angular pressing ecap is a convenient processing tool for introducing very significant grain refinement, typically to the submicrometer level, in a wide range of metals. Keywords low carbon steel, equal channel angular pressing, ultrafine and nanostructures, heat treatment, wear 1. It is relatively simple procedure which can be applied to fairly large billets of many materials ranging from pure metals to precipitationhardened alloys, intermetallics and metalmatrix composites.
One attempt to change this situation is based on the. Research on equal channel angular pressing for ultrafine. After that, microstructure of ufgal was examined using a hitachi. Effect of mechanical alloying and equal channel angular. Mechanical and corrosion properties of az31 mg alloy processed by equalchannel angular pressing and aging article pdf available in procedia engineering 184. Processing of metals by equalchannel angular pressing. Pdf equal channel angular pressing technique for the. C 1173 k for 1 h to evaluate their microstructural stability. Equalchannel angular pressing as a new processing to control the microstructure and texture of metallic sheets abstract fulltext html xml download as pdf size. The deformed samples were annealed in vacuum from 400. Initial porosity impact on equal channel angular pressing ecap of ti6al4v powder material received prispjelo. This article demonstrates the way of using angular pdf file viewer in visual studio 2017.
518 801 444 1005 1289 1548 79 616 1028 1410 1524 1521 1404 927 214 1505 846 1326 299 405 912 1183 70 1167 104 542 1477 969 1339 185 260 921 662 24 99 267 612 46 901 1371 272 450 172 821 684 523