Compromising Effect on Development of Recrystallization Texture in Aluminium Sheet – A 2D MC Type Simulation –

2011 ◽  
Vol 702-703 ◽  
pp. 655-658
Author(s):  
Kunio Ito
Keyword(s):  
Recrystallization Texture ◽  
Cube Texture ◽  
High Rate ◽  
Grain Coarsening ◽  
Migration Rates ◽  
Aluminium Sheet ◽  
Textural Development

The migration rates of C->Si, Si->C, and Si->Sj were assumed to be high and those of Si->Si and all other rates to be low. Here Si(i=1,2,3,4) is a variant of S orientation and C->Si means the growth of a cube grain into an Si grain. The textural development through grain coarsening was simulated as a function of the ratio of the high rate to the low one. The compromising effect surely promotes the development of the cube texture but its decisive development requires any asymmetry between C->Si and Si->C migration processes.

scholarly journals Recrystallization Textures of Silver, Copper and α-Brasses With Different Zinc-Contents as a Function of the Rolling Temperature

1979 ◽  
Vol 3 (2) ◽  
pp. 85-112 ◽  
Author(s):  
Ursula Schmidt ◽  
Kurt Lücke
Keyword(s):  
Pole Figure ◽  
Recrystallization Texture ◽  
Pure Copper ◽  
Cube Texture ◽  
Rolling Texture ◽  
High Accuracy ◽  
Rolling Temperature ◽  
Transition Range ◽  
Mechanisms Of Formation ◽  
Zn Alloys

The recrystallization textures of copper and different Cu-Zn alloys as well as the rolling and recrystallization textures of silver of varying purity were investigated as a function of the rolling temperature. In all cases in which the pure copper type rolling texture was present the cube texture was found as recrystallization texture, whereas in the case of the pure brass type rolling texture the brass type recrystallization texture (326) [835¯] developed. In the transition range a large number of well defined and reproducible recrystallization orientations occurred. The high accuracy of the present pole figure measurements allowed a detailed discussion of the results with regard to the mechanisms of formation of the recrystallization textures.

scholarly journals Effects of Widening during Rolling on the Subsequent Recrystallization Kinetics of Copper

2013 ◽  
Vol 753 ◽  
pp. 285-288
Author(s):  
Feng Xiang Lin ◽  
Torben Leffers ◽  
Wolfgang Pantleon ◽  
Dorte Juul Jensen
Keyword(s):  
Recrystallization Texture ◽  
Electron Backscatter Diffraction ◽  
Cube Texture ◽  
Recrystallization Process ◽  
Recrystallization Kinetics ◽  
Two Samples ◽  
Electron Backscatter ◽  
Cold Rolled ◽  
Backscatter Diffraction ◽  
Kinetics Of

Recrystallization kinetics in copper cold-rolled to 90% reduction with and without significant widening was investigated by electron backscatter diffraction. It was found that the recrystallization process was slightly retarded and the development of cube recrystallization texture was largely inhibited in the widening sample. Cube grains were observed to have a growth advantage by a factor of 2 in the non-widening sample, while this growth advantage was not observed in the widening sample. The recrystallization kinetics and the development of cube texture in the two samples are discussed.

Effect of Pre-Recovery on Recrystallization Texture in Nickel Substrates for Coated Conductors

2013 ◽  
Vol 537 ◽  
pp. 274-278
Author(s):  
Xing Pin Chen ◽  
Xue Chen ◽  
Jing Peng Zhang
Keyword(s):  
Grain Boundaries ◽  
Recrystallization Texture ◽  
Cube Texture ◽  
Pure Nickel ◽  
Coated Conductors ◽  
Recrystallization Annealing ◽  
Electron Backscattered Diffraction ◽  
Recovery Treatment ◽  
Nickel Substrates ◽  
Cold Rolled

Electron backscattered diffraction (EBSD) technology was applied to study the effect of pre-recovery on the recrystallization texture in nickel substrates for coated conductors. Pure nickel (99.999%) was cold rolled by a 95% total reduction, and then samples were annealed at 200 °C for 1 hour and quenched for fully recovery, and finally annealed at 600 °C for 1 hour and quenched in water. The results show that pre-recovery had a strong influence on the formation of cube recrystallization texture. Compared with samples without pre-recovery treatment at 200 °C, samples through pre-recovery treatment can achieve stronger cube texture after recrystallization annealing, and develop more low-angle grain boundaries but less sigma 3 (Σ3) grain boundaries.

scholarly journals An Analysis of Male Internal Migration and Its Correlation to Employment Status: Evidence from the Punjab

2002 ◽  
Vol 7 (2) ◽  
pp. 93-107
Author(s):  
Muhammad Akram ◽  
Lubna Shahnaz ◽  
Surayya Surayya
Keyword(s):  
United Nations ◽  
Social Services ◽  
Urban Areas ◽  
Urban Population ◽  
High Rate ◽  
Urban Migration ◽  
Demand And Supply ◽  
Migration Rates ◽  
The World ◽  
Rural Urban Migration

Migration plays a pivotal role in the reallocation of human resources under changing demand and supply conditions. Migration takes place when an individual decides that it is preferable to move rather than to stay and where the difficulties of moving seem to be less than the expected rewards. In recent years there has been a trend of increasing migration rates. The United Nations (2000) estimates that about 140 million persons (roughly 2 per cent of the world’s population) reside in a country where they are not born.1 Usually migration takes place from the regions that are associated with poverty and insecurity towards regions which offer greater security of life, employment and basic social services. Poverty pushes people to migrate to urban areas-the outcome, the world’s urban population approaches 2.3 billion by 1990 with 61 per cent living in the metropolitan areas of developing countries and touches 66 per cent in 2000 (United Nations). Within the world Asia has about 15 of the largest cities of the world and most of them are growing at more than 5 per cent per annum. Increased rate of natural growth, immigration and rural-urban migration might be the causes of such a high rate of growth of urban population.

Anomalous Rolling and Annealing Textures of Cold Rolled Copper Foils

2007 ◽  
Vol 558-559 ◽  
pp. 229-234 ◽  
Author(s):  
Su Hyeon Kim ◽  
Seung Zeon Han ◽  
Chang Joo Kim ◽  
Soon Young Ok ◽  
In Youb Hwang ◽  
...  
Keyword(s):  
Grain Size ◽  
Texture Component ◽  
Recrystallization Texture ◽  
Rolling Direction ◽  
Cube Texture ◽  
Rolling Texture ◽  
Fiber Texture ◽  
Low Intensity ◽  
Copper Foils ◽  
Cold Rolled

Copper foils cold rolled up to 92% reduction exhibited a low intensity of the β-fiber texture and a high intensity of the cube and RD (rolling direction)-rotated cube components. After annealing, the recrystallization texture of the foils could be characterized by the mixture of the cube and the S components. An initial strong cube texture with a large grain size might remain a less developed rolling texture component, cube or RD-rotated cube, which would be the source of the S component in the recrystallization texture.

Effect of Deformation Texture Component Composition on Cube Texture Formation during Primary Recrystallization in Ni-Based Alloys

2005 ◽  
Vol 495-497 ◽  
pp. 1213-1218 ◽  
Author(s):  
I.V. Gervasyeva ◽  
D.P. Rodionov ◽  
B.K. Sokolov ◽  
Yu.V. Khlebnikova
Keyword(s):  
Texture Component ◽  
Nickel Alloys ◽  
Recrystallization Texture ◽  
Cube Texture ◽  
Component Composition ◽  
Deformation Texture ◽  
Primary Recrystallization ◽  
Rolling Temperature ◽  
Alloying Elements ◽  
Texture Formation

Deformation and primary-recrystallization textures in nickel alloys with some metals (Nb, to 5.4%; W, to 7.4; Re, to 4.1%; Mo, to 9.3%; V, to 10.1%; Mn, to 22.1%; Al, to 12.0% and Cr, to 22.0%) has been studied depending on the content of alloying elements and the rolling temperature. The dependence of the type of recrystallization texture on the component composition of the deformation texture has been established.

Recrystallization Texture of Heavily Cold Rolled Polycrystalline Nickel Sheets with and without Strong Starting Cube Texture

2013 ◽  
Vol 753 ◽  
pp. 293-296 ◽  
Author(s):  
Pinaki Prasad Bhattacharjee ◽  
Yoshihiro Takatsuji ◽  
Yoji Miyajima ◽  
Daisuke Terada ◽  
Nobuhiro Tsuji
Keyword(s):  
Cold Rolling ◽  
High Purity ◽  
Recrystallization Texture ◽  
Cube Texture ◽  
Polycrystalline Nickel ◽  
Roll Bonding ◽  
Different Temperatures ◽  
Cold Rolling And Annealing ◽  
Cold Rolled ◽  
Conventional Rolling

The evolution of texture is studied in high purity (~99.7%) nickel sheets with widely different starting cube texture ({001}) intensities following heavy cold rolling and annealing. For this purpose two nickel sheets with strong and weak starting recrystallization cube texture (SSCT and WSCT, respectively) prepared by Accumulative Roll Bonding and conventional rolling, respectively, followed by annealing are used as the starting materials for subsequent processing. These sheets are cold rolled to 90% reduction in thickness and annealed at different temperatures. Profuse cube oriented bands could be identified in the SSCT nickel sheet after 90% cold rolling as opposed to rather insignificant presence of cube regions in the WSCT nickel sheet. However, the WSCT nickel sheets consistently show stronger cube texture after annealing treatments as compared to the SSCT material. The failure to observe recrystallization cube texture in SSCT is attributed to the inhibited nucleation of cube grains owing to the unfavorable misorientation environment surrounding cube regions in the deformed matrix.

Oblique Cube Texture Formation in High Purity Aluminum during Equal Channel Angular Pressing

2005 ◽  
Vol 105 ◽  
pp. 351-356 ◽  
Author(s):  
Werner Skrotzki ◽  
N. Scheerbaum ◽  
C.G. Oertel ◽  
Heinz Günter Brokmeier ◽  
Satyam Suwas ◽  
...  
Keyword(s):  
Equal Channel Angular Pressing ◽  
Recrystallization Texture ◽  
Room Temperature ◽  
Transverse Direction ◽  
Extrusion Direction ◽  
Cube Texture ◽  
Angular Pressing ◽  
Back Scattering ◽  
First Pass ◽  
High Purity Aluminum

Aluminum of 5N purity has been deformed at room temperature by equal channel angular pressing using three passes of route A. The microstructure and texture have been investigated by electron back-scattering and neutron diffraction. The microstructure from the first pass on is totally dynamically recrystallized. The recrystallization texture consists of an oblique cube component. The oblate grains and the cube texture are anticlockwise rotated about the transverse direction. The inclination with respect to the extrusion direction depends on the distance from the top of the extruded bar and changes from pass to pass. The mechanism of ormation of the recrystallization microstructure and texture is discussed.

Structure of Palladium Single-Crystal Films Prepared by Flash Evaporation onto (001) NaCl Substrates

1970 ◽  
Vol 28 ◽  
pp. 456-457
Author(s):  
L. E. Murr ◽  
G. Wong
Keyword(s):  
Single Crystal ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
High Rate ◽  
Flash Evaporation ◽  
Optimum Load ◽  
Single Crystal Films ◽  
Crystal Films ◽  
A Current

Palladium single-crystal films have been prepared by Matthews in ultra-high vacuum by evaporation onto (001) NaCl substrates cleaved in-situ, and maintained at ∼ 350° C. Murr has also produced large-grained and single-crystal Pd films by high-rate evaporation onto (001) NaCl air-cleaved substrates at 350°C. In the present work, very large (∼ 3cm2), continuous single-crystal films of Pd have been prepared by flash evaporation onto air-cleaved (001) NaCl substrates at temperatures at or below 250°C. Evaporation rates estimated to be ≧ 2000 Å/sec, were obtained by effectively short-circuiting 1 mil tungsten evaporation boats in a self-regulating system which maintained an optimum load current of approximately 90 amperes; corresponding to a current density through the boat of ∼ 4 × 104 amperes/cm2.

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