Texture and Structure Evolution During Indirect Extrusion of an AlSiMgMn Aluminium Alloy

Texture evolution during indirect extrusion of cylindrical profiles of an AlSiMgMn aluminium alloy was investigated in the present work. The effect of extrusion temperature on texture development, through-thickness texture variations and texture variations along the length of the extruded profiles were investigated. In all cases a combined 〈100〉 and 〈111〉 fibre texture developed. Generally, the 〈111〉 fibre was sharper than the 〈100〉 fibre. The texture evolution was rather similar along the length of the profile, while the variations through the thickness were considerable. In a region midways between the centre and the surface of the profiles, the 〈100〉 fibre was weakened, and in the surface regions the two fibres were significantly rotated. The texture measurements showed a strong dependence on extrusion temperature, in the sense that the higher the temperature, the sharper the 〈100〉 fibre texture. The influence of texture variations on formability were also investigated.

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Development of Growth Texture in Nanocrystalline Fe-Ni Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.495-497.749 ◽

2005 ◽

Vol 495-497 ◽

pp. 749-754 ◽

Cited By ~ 2

Author(s):

Chang Sik Ha ◽

Yong Bum Park

Keyword(s):

Energy Density ◽

Grain Growth ◽

Fibre Type ◽

Texture Evolution ◽

Orientation Dependence ◽

Texture Development ◽

Fibre Texture ◽

Abnormal Growth ◽

Ni Alloys ◽

Texture Change

In electroformed pure Ni and Fe-Ni alloys with nanometer-sized crystallites, grain growth that takes place during annealing results in a common texture change. With regard to the macrotextures, the as-deposited textures were of fibre-type characterized by strong <100>//ND and weak <111>//ND components, and the texture development due to grain growth was defined by strong <111>//ND fibre texture with the minor <100>//ND components. It was clarified by means of the microtexture analysis that abnormal growth of the <111>//ND grains occurs in the early stages of grain growth. The possible effects of the abnormal grain growth on the texture evolution have been discussed in terms of the orientation dependence of energy density.

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Effect of extrusion temperature on texture evolution and recrystallization in extruded Mg–1% Mn and Mg–1% Mn–1.6%Sr alloys

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2012.12.078 ◽

2013 ◽

Vol 555 ◽

pp. 219-224 ◽

Cited By ~ 47

Author(s):

Hemant Borkar ◽

Raynald Gauvin ◽

Mihriban Pekguleryuz

Keyword(s):

Texture Evolution ◽

Extrusion Temperature

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Physical Based Microstructure Modelling Coupled with Nucleation Theory during and after Hot Forming of AA5083

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.89-91.509 ◽

2010 ◽

Vol 89-91 ◽

pp. 509-514

Author(s):

Pavel Sherstnev ◽

Christof Sommitsch ◽

Stefan Mitsche ◽

Carsten Melzer

Keyword(s):

Aluminium Alloy ◽

Hot Rolling ◽

Volume Fraction ◽

Electron Backscatter Diffraction ◽

Grain Structure ◽

Nucleation Theory ◽

Structure Evolution ◽

Nucleation Sites ◽

Nucleation Mechanisms ◽

Backscatter Diffraction

A physical model based on three types of dislocations and three nucleation sites for recrystallized grain is applied to hot rolling simulation. This model was implemented into a commercial Finite Element (FE) analysis package FORGE 2008 to calculate both the structure evolution during and the recrystallized volume fraction after hot working of aluminium alloy 5083. It is shown that the main nucleation mechanisms in the aluminium alloy are the particle stimulated nucleation (PSN) and nucleation at grain boundaries. Hence the precipitation kinetics during homogenisation was investigated by use of the thermodynamic calculation software MatCalc. To validate the simulation results hot rolling experiments were performed by means of a laboratory mill. The grain structure evolution was analysed by electron backscatter diffraction (EBSD).

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Texture Evolution During the Drawing of Low Carbon Steel

Textures and Microstructures ◽

10.1155/tsm.22.261 ◽

1994 ◽

Vol 22 (4) ◽

pp. 261-278 ◽

Cited By ~ 3

Author(s):

C. Schuman ◽

C. Esling ◽

M. J. Philippe ◽

M. Hergesheimer ◽

M. Jallon ◽

...

Keyword(s):

Deformation Rate ◽

Early Stage ◽

Texture Evolution ◽

Reduction Rate ◽

Carbon Steels ◽

Texture Gradient ◽

Interstitial Free ◽

Low Carbon ◽

Fibre Texture ◽

Drawing Direction

This study deals with the texture evolution during drawing of interstitial-free low carbon steels under different conditions to study the possible influence of the drawing direction, deformation rate and metal/die friction coefficient. The drawing has been carried out without intermediary annealing, with constant die angle and deformation rate per pass. In all cases, a 〈110〉 fibre texture has been observed at the early stage of deformation (a few percents). The drawing direction, whether alternate or unidirectional, has little effect on texture. Slight differences only in the intensity of peaks on pole figures (PFs) are noted. Alternate drawing leads to higher drawing limits. The grain size affects both the texture and the mechanical properties, which are improved by fine grains. For industrial drawing, i.e. at a high deformation rate, no texture gradient has been clearly observed. Nevertheless, slight differences have been noted in the PF intensities, with generally a slightly sharper texture in the core, compared to the surface. The microhardness tests show no hardness gradient. In slow drawing (low deformation rate), there is a weak texture gradient which disappears at larger deformation. In order to visualize the influence of the metal/die friction, we used a material covered with copper. Results show that at a given reduction rate, the material covered with copper shows peak intensities on the (110) PF which are half these of a material drawn under conventional conditions. The drawing textures of BCC materials always present a 〈110〉 fibre texture. A modeling of the texture evolution during drawing has also been carried out using the Taylor model.

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Texture Development during Mechanical r-Value Determination

Materials Science Forum ◽

10.4028/www.scientific.net/msf.495-497.1493 ◽

2005 ◽

Vol 495-497 ◽

pp. 1493-1498

Author(s):

Christian Klinkenberg ◽

Helmut Klein ◽

Jörg Gerlach

Keyword(s):

Texture Evolution ◽

Sheet Steel ◽

Orientation Distribution ◽

Texture Development ◽

Uniaxial Tensile ◽

Tensile Test Specimen ◽

Uniaxial Tensile Testing ◽

Steel Grades ◽

R Value ◽

Value Determination

This investigation aimed at the understanding of texture development during r-value determination by uniaxial tensile testing. Special emphasis was given to examine the texture evolution in the deformation zone of the tensile test specimen during mechanical r-value determination. The textures of different sheet steel grades were investigated in different deformation stages by the orientation distribution function (ODF) and mechanical testing.

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Accumulative Roll Bonding of 7075 Aluminium Alloy at High Temperature

Materials Science Forum ◽

10.4028/www.scientific.net/msf.638-642.1929 ◽

2010 ◽

Vol 638-642 ◽

pp. 1929-1933 ◽

Cited By ~ 2

Author(s):

P. Hidalgo ◽

C.M. Cepeda-Jiménez ◽

O.A. Ruano ◽

F. Carreño

Keyword(s):

Solid Solution ◽

High Temperature ◽

Aluminium Alloy ◽

Accumulative Roll Bonding ◽

Dynamic Recovery ◽

Rolling Texture ◽

Al Alloy ◽

Roll Bonding ◽

Fibre Texture ◽

Grain Sizes

The 7075 Al alloy was processed by accumulative roll bonding (ARB) at 300, 350 and 400 °C. The microstructure and texture were characterized and the hardness was measured. Cell/(sub)grain sizes less than 500 nm and typical β-fibre rolling texture were observed in the three ARBed samples. At 400 °C, the presence of elements in solid solution leads to a poorly misoriented microstructure and to a homogeneous β-fibre texture. At 300 and 350 °C highly misoriented microstructure and heterogeneous β-fibre rolling texture are observed, especially at 350 °C, wherein the degree of dynamic recovery is higher. Hardness of the ARBed samples is affected by the amount of atoms in solid solution at the different processing temperatures.

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Structure Evolution in Plated Cu Films

MRS Proceedings ◽

10.1557/proc-863-b5.2 ◽

2005 ◽

Vol 863 ◽

Author(s):

D.P. Field ◽

NJ Park ◽

PR Besser ◽

JE Sanchez

Keyword(s):

Film Thickness ◽

Grain Growth ◽

Texture Evolution ◽

Structural Evolution ◽

Similar Process ◽

Structure Evolution ◽

Line Geometry ◽

Strong Function ◽

Cu Films ◽

Line Widths

AbstractStructure evolution in plated Cu films is a function of sublayer stacking, film thickness, plating chemistry, plating parameters, and temperature. The present work examines grain growth and texture evolution in annealed plated Cu on a 25 nm thick Ta sublayer for films of 480 and 750 nm in thickness. These results are compared against those obtained from damascene Cu lines fabricated from a similar process, using a series of line widths. The results show that the initial structures of the plated films are similar, with slightly weaker (111) texture, a higher fraction of twin boundaries, and larger grains in the thicker films. The microstructure of the Cu within the trench constraints is a strong function of line geometry with the propensity for twin boundary development controlling structural evolution.

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