scholarly journals A Simulation of Recrystallization Textures of Al-Alloys With Consideration of the Probabilities of Nucleation and Growth

1999 ◽  
Vol 32 (1-4) ◽  
pp. 197-219 ◽  
Author(s):  
O. Engler
Keyword(s):  
Recrystallization Texture ◽  
Rolling Texture ◽  
Al Alloys ◽  
Second Phase ◽  
Microstructural Parameters ◽  
Nucleation Sites ◽  
Acta Mater ◽  
Growth Selection ◽  
Cold Rolled ◽  
Growth Probability

The characteristic recrystallization texture components of cold rolled Al-alloys can be traced back to a growth selection of grains with an approximate 40º 〈111〉 orientation relationship out of a limited spectrum of preferentially formed nucleus orientations. Accordingly, recrystallization textures can be modeled by the multiplication of a function f(g)nucl describing the probability of nucleation of the various orientations and a function f(g)grow representing their growth probability.Whereas the growth probability can be accounted for by a 40 111 transformation of the rolling texture, the nucleation probability of the respective grains is given by the distribution of potential nucleus orientations, which is known from local texture analysis for the most important nucleation sites in cold rolled Al-alloys, cube-bands, grain boundaries and second-phase particles. If several nucleation sites are active simultaneously, the nucleation probabilities have to be weighted according to their respective proportions. For that purpose, the numbers of nuclei forming at the various nucleation sites were calculated according to a model approach proposed by Vatne et al. (Acta Mater 44, 1996, 4463–4473).The paper describes the model for recrystallization texture simulation in Al-alloys and gives examples of recrystallization textures simulated regarding a variation of different microstructural parameters to demonstrate the predictive power of the model.

scholarly journals Simulation of the Recrystallization Textures of Al-Alloys on the Basis of Nucleation and Growth Probability of the Various Textures Components

1997 ◽  
Vol 28 (3-4) ◽  
pp. 197-209 ◽  
Author(s):  
O. Engler
Keyword(s):  
Rolling Texture ◽  
Nucleation Site ◽  
Al Alloys ◽  
Second Phase ◽  
Nucleation Sites ◽  
Second Phase Particles ◽  
Growth Selection ◽  
Cold Rolled ◽  
Limited Spectrum ◽  
Growth Probability

The recrystallization textures of cold rolled Al-alloys are simulated under the assumption of a growth selection of the typical recrystallization texture components out of a limited spectrum of preferentially formed nucleus orientations. The probability of nucleation is derived from the distribution of the potential nucleus orientations which was determined by EBSD local texture analysis for the most important nucleation sites in cold rolled commercial Al-alloys, i.e. Cube-bands, grain boundaries and second phase particles. If several nucleation sites are active simultaneously, the total nucleation probability is composed of the respective contributions of each nucleation site. The growth probability is derived from a 40°<111> transformation of the rolling texture. The resulting recrystallization textures are simulated by multiplying these two probability functions, i.e. the ODF of the nucleus orientations with the ODF of the 40°<111>-transformed rolling texture.

scholarly journals A Microstructure Investigation of the Deformation and Recrystallization of Particle-Containing Aluminium-Silicon Alloys

1993 ◽  
Vol 20 (1-4) ◽  
pp. 125-140 ◽  
Author(s):  
F. Habiby ◽  
F. J. Humphreys
Keyword(s):  
Single Crystals ◽  
Recrystallization Texture ◽  
Rolling Texture ◽  
Plasticity Theory ◽  
Second Phase ◽  
Slip Systems ◽  
Deformation Bands ◽  
Silicon Alloys ◽  
X Ray ◽  
Second Phase Particles

Single crystals and polycrystals of aluminium containing non-deformable second-phase particles of silicon, have been deformed, and the resultant structures investigated by microscopy and by X-ray and microtexture techniques. The particle size is found to influence the scale of the deformation bands formed, and there is evidence that particles may affect the nucleation of these bands. The deformed materials were recrystallized, and the effect of particle stimulated nucleation on the weakening of the rolling texture is discussed with reference to a computer simulation. In contrast, the recrystallization texture of particle-containing single crystals deformed on only two slip systems is sharp, and it is shown that the texture components are consistent with plasticity theory.

Application of Recrystallization Texture Evolution Model to Predict Plastic Formability in Steel Strips

2014 ◽  
Vol 783-786 ◽  
pp. 1954-1960
Author(s):  
Toshiharu Morimoto ◽  
Y. Fuyuki ◽  
A. Yanagida ◽  
Jun Yanagimoto
Keyword(s):  
Recrystallization Texture ◽  
Texture Evolution ◽  
Steel Strip ◽  
Rolling Texture ◽  
Interstitial Free ◽  
If Steel ◽  
Taylor Model ◽  
Steel Strips ◽  
Cold Rolled ◽  
Hot Rolled

T.M.C.P.(Thermo Mechanical Control Processing) has been widely used to improveplastic formability in steel strips. We have produced interstitial free steel(IF steel) strips and ferriticstainless-steel strips through T.M.C.P. rolling method. Optimizing conditions of hot rolling, hotrolled annealing, cold rolling and cold rolled annealing, we developed texture prediction model. Wecan predict rolling texture accurately using the conventional Taylor model. Moreover, we preciselypredict recrystallization texture classifying the total number of microscopic􀀁 slips which arecalculated using the Taylor model. We consider that these calculated results provednucleation-oriented model and two types of recrystallization and grain growth mechanisms exit inour studies. One mechanism is that grains which had the small total number of microscopic slips arepreferred orientation for the hot rolled and annealed ferritic stainless-steel strip. The othermechanism is that grains which had the high total number of microscopic slips are preferredorientation for the cold rolled and annealed IF steel strip.

Microstructure, Texture and Recrystallisation Mechanisms of an Al-20%Sn Deformation Processed Metal-Metal Composite

2012 ◽  
Vol 715-716 ◽  
pp. 522-527 ◽  
Author(s):  
Rafael Schouwenaars ◽  
Hugo A. Duran ◽  
Víctor H. Jacobo ◽  
Armando Ortiz
Keyword(s):  
Phase Distribution ◽  
Rolling Texture ◽  
Coarse Grained ◽  
Al Alloy ◽  
Second Phase ◽  
Metal Composite ◽  
Fine Grained ◽  
Texture Change ◽  
Metal Metal ◽  
Cold Rolled

Al-Sn alloys for tribological applications are industrially important alloys which have attracted little attention over their history. Being cold rolled directly from thin cast slabs and consisting of two ductile phases, their processing and physical behaviour are distinct from classical Al-Alloys. During cold rolling, the coarse-grained, random texture of the slab is transformed into the classical rolling texture of a fine-grained Al-alloy, with elongated Al-grains delimited by thin Sn-ribbons. During annealing at 300°C, the interior of the Al-grains recrystallises rapidly while the liquid Sn-phase migrates toward Al-grain triple lines to form a reticular structure. A weak texture, dominated by Goss and P is produced. Grain growth within the original cold-rolled grains is fast, but once the recrystallised grain size reaches the length scale of the second-phase distribution, it slows down and both phases coarsen simultaneously, accompanied by a significant texture change.

Producing a Random Recrystallization Texture in 6111 Aluminium Alloy

2005 ◽  
Vol 495-497 ◽  
pp. 591-596 ◽  
Author(s):  
Cynthia S.T. Chang ◽  
A.S.C. Yeung ◽  
B.J. Duggan
Keyword(s):  
Heat Treatment ◽  
Aluminium Alloy ◽  
Solution Heat Treatment ◽  
Recrystallization Texture ◽  
Rolling Texture ◽  
Heat Treated ◽  
Complete Recrystallization ◽  
Hot Band ◽  
Cold Rolled ◽  
The Difference

6111 Aluminium Alloy in the hot band state was cold rolled to 80% was then annealed at 450oC, 500oC and 540oC for recrystallization. The hot band was also solution heat treated, cold rolled and annealed to the same temperature to look at the difference in the recrystallization texture and precipitation states. It was found that the samples which were cold rolled and annealed without solution heat treatment gave Goss and P components after annealing. For the samples with solution heat treatment, the 450oC sample has a retained Cu type rolling texture while for the 500oC and 540oC the textures are quite random. The retained rolling texture found in the 450oC sample is due to the fact that it was partially recrystallized as the precipitates prevent complete recrystallization. The difference in the precipitation states during and after annealing of the samples with and without solution heat treatment affects the final recrystallization texture.

Large Strain Deformation and Annealing of Aluminium

2006 ◽  
Vol 519-521 ◽  
pp. 79-84 ◽  
Author(s):  
X. Huang ◽  
Q. Xing ◽  
Dorte Juul Jensen ◽  
Niels Hansen
Keyword(s):  
Lamellar Structure ◽  
Large Strain ◽  
Rolling Texture ◽  
Rolling Plane ◽  
Stored Energy ◽  
High Angle ◽  
Microstructural Parameters ◽  
Structure Correlations ◽  
Cold Rolled ◽  
Commercial Purity Aluminum

TEM, Kikuchi diffraction analyses, EBSD, neutron diffraction and hardness measurements have been applied in a study of commercial purity aluminum (AA1200) cold rolled to strains 2 and 4 and afterwards recovered by a heat treatment for 2h at temperatures up to 220 °C. The deformation microstructure is a lamellar structure delineated by dislocation boundaries and high angle boundaries ( ) parallel to the rolling plane. The macrotexture is a typical rolling texture which is composed of individual texture components present as micrometer- and submicrometre-sized volumes. In the lamellar structure, correlations have been established between microstructural parameters and the local texture, showing for example that the density of high angle boundaries and the stored energy vary locally. The local variations affect the annealing behaviors in a way that some regions coarsen faster than others, leading to a recovered structure which is heterogeneous.

Unique Effect of Carbon Addition on Development of Deformation and Recrystallization Textures in Heavily Cold-Rolled Fe-3%Si Alloys

2018 ◽  
Vol 941 ◽  
pp. 890-895
Author(s):  
Masanori Takenaka ◽  
Yasuyuki Hayakawa ◽  
Nobuhiro Tsuji
Keyword(s):  
Cold Rolling ◽  
Recrystallization Texture ◽  
Rolling Texture ◽  
Fiber Texture ◽  
Carbon Addition ◽  
Deformation Bands ◽  
Slip Bands ◽  
Unique Effect ◽  
Cold Rolled ◽  
Active Slip

This study investigated the effects of carbon addition on the development of deformation and recrystallization textures in 3 mass% Si steels cold-rolled by 95% reduction in thickness. A 3% Si steel with 0.016 mass% carbon developed RD // <110> (α-fiber) cold-rolling texture to a much greater extent than a 3% Si steel containing carbon less than 0.0005 mass%, whereas it is well known that the development of α-fiber rolling texture is suppressed by the addition of carbon in steels without silicon. This unique effect of carbon addition in the 3% Si steel appeared to be originated from a change in active slip systems. Straight slip bands were observed in the specimen without carbon, and the active slip plane was identified as {110}. On the other hand, wavy slip bands were observed in the steel containing carbon resulted from the activation of {112} and {123} slip planes in addition to {110}. It was also observed that {411}<148> recrystallization texture developed in the carbon-bearing 3% Si steel. Since the recrystallized grains with {411}<148> orientation preferentially nucleated in the vicinity of highly-strained deformation bands formed in deformed grains having α-fiber orientations, it is concluded that the development of {411}<148> recrystallization texture was resulted from the formation of the α-fiber texture after heavy cold-rolling in the carbon-bearing 3% Si steel.

Texture Evolution during Recrystallisation of Cold Rolled TWIP Steel

2011 ◽  
Vol 702-703 ◽  
pp. 647-650
Author(s):  
Ahmed A. Saleh ◽  
Elena V. Pereloma ◽  
Azdiar A. Gazder
Keyword(s):  
Cold Rolling ◽  
Twip Steel ◽  
Texture Evolution ◽  
Rolling Texture ◽  
Austenitic Steels ◽  
X Ray Diffraction ◽  
Energy Materials ◽  
X Ray ◽  
Nucleation Sites ◽  
Cold Rolled

A TWinning Induced Plasticity (TWIP) steel was cold rolled to 42% thickness reduction followed by isochronal annealing for 300 s between 600-850 °C. Bulk texture evolution during recrystallisation was investigated by X-Ray Diffraction. While the development of the α-fibre after cold rolling is typical of low stacking fault energy materials, anomalously higher intensities were noted for the Goss ({110}) compared to Brass ({110}) orientations. Upon recrystallisation, the main rolling texture components were retained and ascribed to nucleation at orientations close to those of the deformed matrix followed by annealing twinning which leads to crystallographically identical variants. Unlike previous texture investigations on austenitic steels, the relatively homogeneous deformation microstructure and uniform distribution of subsequent nucleation sites led to the retention of the F ({111}) orientation. Moreover, the firsthand observation of the Rotated Copper ({112}) orientation in TWIP steel is attributed to the second order twinning of the A ({110}) orientation.

Influence of Cold Rolling Reduction and Cross Rolling on Recrystallization Texture Formation in Electro Deposited Pure Iron with a Sharp and Homogeneous //ND Fiber

2014 ◽  
Vol 783-786 ◽  
pp. 313-318
Author(s):  
Naoki Yoshinaga ◽  
Dirk Vanderschueren ◽  
Leo Kestens ◽  
Kohsaku Ushioda ◽  
Natsuko Sugiura
Keyword(s):  
Cold Rolling ◽  
Pure Iron ◽  
Recrystallization Texture ◽  
Rolling Texture ◽  
Rolling Reduction ◽  
Rolled Sheet ◽  
Texture Formation ◽  
Annealing Texture ◽  
Cold Rolling Reduction ◽  
Cold Rolled

The cold rolling and annealing texture formation has been investigated in electro deposited pure iron which has an extremely sharp and isotropic <111>//ND fiber. Regardless of cold rolling reduction, {111}<112> intensified texture is formed after cold rolling. Similar texture remains after recrystallization in 65% cold rolled material while {111}<110> type texture forms in 80% and 90% cold rolled ones. The recrystallized grains at the stage of 5% recrystallization have {111}<112> orientation in 65% cold rolled sheet, whereas {111}<110> is observed in 80% cold rolled one. From this aspect, it is considered that the nucleation orientation plays an important role in the recrystallization texture formation. In the meanwhile, the growth of the recrystallized nuclei is also supposed to affect the recrystallization texture formation. The nuclei with {111}<112> orientation in lightly cold rolled sheet are easier to consume the deformed matrix than they do in heavily cold rolled sheets because their frequency to encounter a deformed grain with nearly the same orientation is much smaller in lightly cold rolled specimen, which can result in a large mobility for growth. Cross cold rolling makes cold rolling texture rather homogeneous <111>//ND fiber, which gives rise to an almost homogeneous <111>//ND fiber after annealing.

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.

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