ultra-fine grain foils and sheets by large-strain extrusion machining

Micro

2007/2/16Micro-extrusion of ultra-fine grained aluminium Micro-extrusion of ultra-fine grained aluminium Rosochowski, Andrzej; Presz, Wojciech; Olejnik, Lech; Richert, Maria 2007-02-16 00:00:00 Int J Adv Manuf Technol (2007) 33:137–146 DOI 10.1007/s00170-007-0955-6 ORIGINAL ARTICLE Andrzej Rosochowski Wojciech Presz Lech Olejnik Maria Richert Received: 6 February 2006

Micro Deep Drawability of the Superplastic Zn–22Al

2019/9/5To this goal, first the two-step equal channel angular extrusion (ECAE) process was carried out to obtain an ultra-fine-grained structure (UFG). Upon achieving the grain size of 200 nm, the formability of the alloy at room temperature and at a high strain rate

Advanced Rolling Technologies for Producing Ultrafine

2014/10/24In the asymmetric rolling process, sheets or foils are passed between rolls that either have different diameters or rotate at different angular speeds. Asymmetric rolling has significant potential for a variety of industrial applications because it involves a reduction in the rolling pressure and an improvement in the sheet shape.

USCAR: USAMP Automotive Metals Division:

10:30-11:00 MTT - Ultrafine-Grained Foils and Sheets by Large-Strain Machining Processes The objective of this project was to evaluate the feasibility of producing fine grain magnesium sheet by the application of large strain machining processes.

The New Plastic Flow Machining Process for Producing

This process involves grain subdivision caused by the buildup of GNDs and new fine grain formation with high-angle grain boundaries (HAGBs) during large deformation at room temperature [21, 22]. The smaller grain size change in the REA compared with that in the MA and LEA when is varied implies that the strain imposed in the REA was less dependent on the geometry of the die.

Preface p. xv UFG Material Fundamentals

Large Scale Manufacturing of Ultra-Fine Grained Materials p. 161 Machining as a Method for Studying Effects of Very Large Strain Deformation p. 167 On the Forces Generated During Friction Stir Processing of Aluminum 5052 Sheets p. 173 Manufacturing of

(PDF) Microembossing of ultrafine grained Al:

Faceting of Σ3 Grain Boundaries in Al By Boris Straumal Extreme grain refinement by severe plastic deformation: A wealth of challenging science By Y. Estrin Download pdf Close Log In Log In with Facebook Log In with Google Sign Up with Apple or Email:

Sliding wear behaviour of CP titanium laminates produced

2021/3/22In large strain extrusion machining grain starts elongating in the direction of laminate formation at low strain rate and get converted into equiaxed grains at higher strain rates. Alignment of grains along the laminate direction may became the reason for higher wear rate in that direction as compared to wear rate in perpendicular direction.

(PDF) Microembossing of ultrafine grained Al:

Faceting of Σ3 Grain Boundaries in Al By Boris Straumal Extreme grain refinement by severe plastic deformation: A wealth of challenging science By Y. Estrin Download pdf Close Log In Log In with Facebook Log In with Google Sign Up with Apple or Email:

Large Strain Extrusion Machining under Cryogenic

2018/1/1The suppression of the chip segmentation was achieved and sheets with an Ultra-Fine Grain (UFG) microstructure were obtained thanks to the careful choice of the investigated process parameters. In [14] the feasibility of exploiting LSEM as a low-cost production technique for manufacturing magnesium sheets was investigated.

A Study on Surface Properties of Chips Produced by Large

Different shapes such as foils, sheets and bars of controlled dimensi ons are produced with controlled geometric parameters of the deformation using large strain extrusion machining. The paper reviews all the characteristics of large strain extrusion machining, its

The effect of strain and path change on the mechanical

Equal Channel Angular Extrusion The severe plastic deformation technique known as equal channel angular extrusion (ECAE) was pioneered in Soviet Russia in 1972 by V. M. Segal [1, 2]. This processing technique allows the creation of ultra-fine or nano-scale

Ultrafine Grained Materials III

These proceedings focus on all aspects of the science and technology of ultrafine-grained materials produced by Severe Plastic Deformation (SPD) techniques. Topics include SPD processing and SPD-processed materials, processing and microstructures, microstructural evolution, mechanical and physical properties, superplasticity, computational and analytical modeling, new SPD technologies and

Nobuhiro Tsuji

Abstract: In the present work, effects of loading scheme and strain reversal on structure evolution are studied by using high pressure torsion (HPT) and twist extrusion (TE) techniques. High purity aluminum (99.99%) was processed at room temperature up to a total average equivalent strain of ~4.8 by TE and HPT with two deformation modes: monotonic and reversal deformation with a step of 12

A Study on Surface Properties of Chips Produced by Large

Different shapes such as foils, sheets and bars of controlled dimensi ons are produced with controlled geometric parameters of the deformation using large strain extrusion machining. The paper reviews all the characteristics of large strain extrusion machining, its

Fabrication of ultra

2013/1/1The ductility of annealed AA1050 is better than that of AA6061 sheets, and the ductility of the AA1050/AA6061 foils shows a large reduction after rolling. In addition, as shown in Fig. 2 (a), the elastic modulus after ARB decreases slightly compared with that of the annealed sheets, and increases with further AR passes.

Historical Studies by Polish Scientist on Ultrafine

Such large deformations lead to creation of an ultra-fine grain structure. The size of the individual grains corresponds to the free distance of dislocations in a given strain. The mechanism of plastic deformations acting in an ultra-fine grain structure and permitting to obtain the large strains have been presented. 5 )

Ultrafine Grained Materials III

These proceedings focus on all aspects of the science and technology of ultrafine-grained materials produced by Severe Plastic Deformation (SPD) techniques. Topics include SPD processing and SPD-processed materials, processing and microstructures, microstructural evolution, mechanical and physical properties, superplasticity, computational and analytical modeling, new SPD technologies and

Microstructure, Mechanical And Wear Properties Of Aluminum 5083 Alloy Processed By Equal Channel Angular Extrusion

Keywords: Equal channel angular extrusion, optical microscope, wear, aluminum 5083 alloy. 1. Introduction Aluminum and its alloys are being widely used as a predominant material in various engineering applications. More significantly, ultra fine

Fabrication of ultra

2013/8/6The ductility of annealed AA1050 is better than that of AA6061 sheets, and the ductility of the AA1050/AA6061 foils shows a large reduction after rolling. In addition, as shown in Fig. 2 (a), the elastic modulus after ARB decreases slightly compared with that of the annealed sheets, and increases with further AR passes.

Producing Ultrafine Grain Al6061 Alloy by Accumulative

2011/8/19Producing Ultrafine Grain Al6061 Alloy by Accumulative Back Extrusion Process Producing Ultrafine Grain Al6061 Alloy by Accumulative Back Extrusion Process Alihosseini, H.; Faraji, G.; Dehghani, K. 2011-08-19 00:00:00 Accumulative back extrusion (ABE) is a kind of severe plastic deformation process to refine the microstructure, resulting in significant improvement in mechanical

Advanced rolling technologies for producing ultra

could be used to produce a grain size of about 100200 nm- at the sample edge, while at the sample center it is 600 nm for AA1050 when the equivalent strain is in the range 4.2 ~ 5.8 (Zhang et al, 2010). Zuo et al. (2008)observed extremely fine 500 nm grains in

Nobuhiro Tsuji

Abstract: In the present work, effects of loading scheme and strain reversal on structure evolution are studied by using high pressure torsion (HPT) and twist extrusion (TE) techniques. High purity aluminum (99.99%) was processed at room temperature up to a total average equivalent strain of ~4.8 by TE and HPT with two deformation modes: monotonic and reversal deformation with a step of 12

Study on Surface Hardness and Microstructure of Pure

2019/7/8Large strain extrusion machining (LSEM) is one of the severe plastic deformation (SPD) methods that can improve the mechanical properties of materials. The purpose of this experiment is to study the surface hardness and microstructure of the pure copper chip strips. It was found that most of the grains of the chip strips had been refined to the ultrafine grain grade. Finite element analysis

Manufacture of gradient micro

2013/12/16These materials have been classified as ultra fine grain (UFG) materials (grain sizes in the range of 100 to 1000-nm) and nano-materials (grain size 100-nm) depending on the grain size. This report addresses the production of bulk UFG metals through the use of severe plastic deformation processing, and their subsequent use as stock material for further thermomechanical processing,

Continuous Severe Plastic Deformation Processing of

2001/10/1These materials have been classified as ultra fine grain (UFG) materials (grain sizes in the range of 100 to 1000-nm) and nano-materials (grain size 100-nm) depending on the grain size. This report addresses the production of bulk UFG metals through the use of severe plastic deformation processing, and their subsequent use as stock material for further thermomechanical processing,

Nobuhiro Tsuji

Abstract: In the present work, effects of loading scheme and strain reversal on structure evolution are studied by using high pressure torsion (HPT) and twist extrusion (TE) techniques. High purity aluminum (99.99%) was processed at room temperature up to a total average equivalent strain of ~4.8 by TE and HPT with two deformation modes: monotonic and reversal deformation with a step of 12

XRD Graphite Manufacturingultra-fine grain foils and sheets by large-strain extrusion machining