Superplastic Behavior of Ultrafine Grained Al Alloys Fabricated by Severe Plastic Deformation

During the last decade severe plastic deformation (SPD) has become a widely known method of materials processing used for fabrication of ultrafine-grained materials with attractive properties. Nowadays SPD processing is rapidly developing and is on the verge of a transition from lab-scale research to commercial production. This paper focuses on several new trends in the development of SPD techniques for effective grain refinement, including those for commercial alloys and presents new SPD processing routes to produce bulk nanocrystalline materials.

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Investigations on Microstructure Evolution and Deformation Behavior of Aged and Ultrafine Grained Al-Zn-Mg Alloy Subjected to Severe Plastic Deformation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.667-669.253 ◽

2010 ◽

Vol 667-669 ◽

pp. 253-258

Author(s):

Wei Ping Hu ◽

Si Yuan Zhang ◽

Xiao Yu He ◽

Zhen Yang Liu ◽

Rolf Berghammer ◽

...

Keyword(s):

Electron Microscopy ◽

Mechanical Properties ◽

Plastic Deformation ◽

Grain Size ◽

Severe Plastic Deformation ◽

Microstructure Evolution ◽

Deformation Behavior ◽

Deformation Mechanisms ◽

Mg Alloy ◽

Ultrafine Grained

An aged Al-5Zn-1.6Mg alloy with fine η' precipitates was grain refined to ~100 nm grain size by severe plastic deformation (SPD). Microstructure evolution during SPD and mechanical behaviour after SPD of the alloy were characterized by electron microscopy and tensile, compression as well as nanoindentation tests. The influence of η' precipitates on microstructure and mechanical properties of ultrafine grained Al-Zn-Mg alloy is discussed with respect to their effect on dislocation configurations and deformation mechanisms during processing of the alloy.

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MULTI-SCALE FINITE ELEMENT SIMULATION OF SEVERE PLASTIC DEFORMATION

International Journal of Modern Physics B ◽

10.1142/s0217979209061366 ◽

2009 ◽

Vol 23 (06n07) ◽

pp. 1621-1626

Author(s):

HYOUNG SEOP KIM

Keyword(s):

Plastic Deformation ◽

Finite Element ◽

Severe Plastic Deformation ◽

Constitutive Model ◽

Dislocation Cell ◽

Ultrafine Grain ◽

Angular Pressing ◽

Element Simulation ◽

Ultrafine Grain Size ◽

Ultrafine Grained

The technique of severe plastic deformation (SPD) enables one to produce metals and alloys with an ultrafine grain size of about 100 nm and less. As the mechanical properties of such ultrafine grained materials are governed by the plastic deformation during the SPD process, the understanding of the stress and strain development in a workpiece is very important for optimizing the SPD process design and for microstructural control. The objectives of this work is to present a constitutive model based on the dislocation density and dislocation cell evolution for large plastic strains as applied to equal channel angular pressing (ECAP). This paper briefly introduces the constitutive model and presents the results obtained with this model for ECAP by the finite element method.

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Fatigue behavior of ultrafine grained medium Carbon steel processed by severe plastic deformation

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/63/1/012163 ◽

2014 ◽

Vol 63 ◽

pp. 012163 ◽

Cited By ~ 3

Author(s):

C Ruffing ◽

Yu Ivanisenko ◽

E Kerscher

Keyword(s):

Plastic Deformation ◽

Carbon Steel ◽

Severe Plastic Deformation ◽

Fatigue Behavior ◽

Medium Carbon Steel ◽

Medium Carbon ◽

Ultrafine Grained

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Relaxation Processes in Ultrafine-Grained Copper Processed by Severe Plastic Deformation

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.156.229 ◽

1998 ◽

Vol 156 ◽

pp. 229-234

Author(s):

N.M. Amirkhanov ◽

Rinat K. Islamgaliev

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Relaxation Processes ◽

Ultrafine Grained

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Texture Development in a Model Al-Li Alloy Subjected to Severe Plastic Deformation

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.114.337 ◽

2006 ◽

Vol 114 ◽

pp. 337-344 ◽

Cited By ~ 2

Author(s):

Bogusława Adamczyk-Cieślak ◽

Jaroslaw Mizera ◽

Krzysztof Jan Kurzydlowski

Keyword(s):

Plastic Deformation ◽

Severe Plastic Deformation ◽

Equal Channel Angular Extrusion ◽

Orientation Distribution ◽

X Ray Diffraction ◽

Technological Parameters ◽

Initial State ◽

Texture Characteristic ◽

X Ray ◽

Ultrafine Grained

The texture of Al – 0.7 wt. % Li alloy processed by two different methods of severe plastic deformation (SPD) has been investigated by X-ray diffraction, and analyzed in terms of the orientation distribution function (ODF). It was found that severe plastic deformation by both Equal Channel Angular extrusion (ECAE) and Hydrostatic Extrusion (HE) resulted in an ultrafine grained structure in an Al – 0.7 wt. % Li alloy. The microstructure, grain shape and size, of materials produced by SPD strongly depend on the technological parameters and methods applied. The texture of the investigated alloy differed because of the different modes of deformation. In the initial state the alloy exhibited a very strong texture consisting of {111} fibre component. A similar fibrous texture characteristic was also found after HE whereas after the ECAE the initial texture was completely changed.

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