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.

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.

Magnetically Controlled Recrystallization Texture in Titanium

2004 ◽  
Vol 467-470 ◽  
pp. 483-488 ◽  
Author(s):  
Dmitri A. Molodov ◽  
A.D. Sheikh-Ali
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Grain Growth ◽  
Texture Component ◽  
Driving Force ◽  
Recrystallization Texture ◽  
Rolling Direction ◽  
Field Direction ◽  
Titanium Sheet ◽  
Cold Rolled

The annealing of cold rolled (82%) titanium sheet at 750°C in a magnetic field of 19.4 Tesla results in a distinct difference between texture peaks when the sample is tilted by +30° or -30° to the field direction around the rolling direction, i.e. c (<0001>)-axis of grains corresponding to one texture component is aligned normal to the field direction. This result is attributed to grain growth affected by an additional driving force arising in a magnetic field by the anisotropy of the magnetic susceptibility of titanium.

Microstructures and Mechanical Properties of Thermomechanically Processed TiNbSi Alloys for Biomedical Applications

2007 ◽  
Vol 342-343 ◽  
pp. 553-556
Author(s):  
Won Yong Kim
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Elastic Modulus ◽  
Texture Component ◽  
Biomedical Applications ◽  
Rolling Direction ◽  
Fiber Texture ◽  
Β Phase ◽  
Average Grain Size ◽  
Cold Rolled

Mechanical properties and elastic modulus were examined in order to clarify the influence on microstructures in Ti-26Nb-xSi, where x= 0.5, 1 in atomic percent, prepared by arc melting, cold rolling and recrystallization heat treatment. On the basis of microstructural observations and phase analyses, it is evidently revealed that the microstructure of as-quenched sample appeared to mixture appearance consisting of mostly bcc-structured β phase and small amount of orthorhombic-structured α″ phase. Elongated structure parallel to the rolling direction was observed in cold rolled samples, and equiaxed structure with the average grain size of about 20μm was developed for the sample after recrystallization heat treatment. Randomly distributed feature of pole figure was characterized without showing a specific texture component in asquenched sample. Rotated cube, α-fiber and γ-fiber texture components were detected in cold-rolled sample. After recrystallization heat treatment the intensity of α-fiber texture component was markedly decreased, while the rotated cube component becomes sharpened and γ-fiber component remains relatively unchanged. From both elastic modulus and strength point of view recrystallization treatment would be desirable to meet the required mechanical properties of the present alloys for biomedical applications.

Effect of Thermo-Mechanical Processing on Microstructure and Elastic Modulus of Metastable Ti-Nb-Si Alloys for Biomedical Application

2007 ◽  
Vol 544-545 ◽  
pp. 271-274 ◽  
Author(s):  
Han Sol Kim ◽  
Won Yong Kim
Keyword(s):  
Heat Treatment ◽  
Elastic Modulus ◽  
Cold Rolling ◽  
Texture Component ◽  
Thermomechanical Processing ◽  
Biomedical Application ◽  
Rolling Direction ◽  
Cube Texture ◽  
Fiber Texture ◽  
Average Grain Size

This work describes the effect of microstructures on elastic modulus in Ti-26Nb-xSi alloy (x=0.5~1.5at.%) prepared by arc melting, cold rolling and recrystallization heat treatment. OM observation and x-ray diffraction analysis revealed that the microstructure of as-quenched sample appeared to mixture appearance consisting of mostly bcc-structured β phase and small amount of orthorhombic-structured α″ phase. After cold rolling, elongated structure parallel to the rolling direction was observed, and equiaxed structure with the average grain size of about 20~30μm was developed for the sample after recrystallization heat treatment. In as-quenched sample randomly distributed feature of pole figure was characterized without showing a specific texture component. In cold-rolled sample α-fiber, γ-fiber and rotated cube texture components were detected. After recrystallization heat treatment the intensity of α-fiber texture component was markedly decreased, while the rotated cube component becomes sharpened and γ-fiber component remains relatively unchanged. The elastic modulus increased by cold rolling and then decreased by recrystallization over the entire chemical composition range investigated. The variation of elastic modulus values was interpreted in terms of changes in texture components depending on thermomechanical processing.

Role of Deformation Twinning in Cold Rolling and Recrystallization of Titanium

2005 ◽  
Vol 495-497 ◽  
pp. 651-656 ◽  
Author(s):  
Y.B. Chun ◽  
S. Lee Semiatin ◽  
Sun Keun Hwang
Keyword(s):  
Heat Treatment ◽  
Cold Rolling ◽  
Texture Component ◽  
Recrystallization Texture ◽  
Rolling Texture ◽  
Mechanical Twinning ◽  
Treatment Temperature ◽  
Recrystallization Annealing ◽  
Cp Ti ◽  
Evolution Of Microstructure

The evolution of microstructure and texture during cold rolling and recrystallization annealing of commercial-purity Ti (CP-Ti) was established. Cold rolling to 40% reduction activated mechanical twinning- mostly > 3 2 11 < } 2 2 11 { compressive twins and > 1 1 10 < } 2 1 10 { tensile twins. The formation of twins resulted in an inhomogeneous microstructure, in which only the localized regions containing twins were refined and the regions deformed by slip remained coarse. The twinned grains, containing high stored energy and numerous high-angle grain boundaries, became the preferential sites of nucleation during subsequent recrystallization. During recrystallization heat treatment at 500~700°C, the cold-rolling texture (ϕ1=0°, Φ=35°, ϕ2=30°) diminished in intensity, whereas a recrystallization texture component (ϕ1=15°, Φ=35°, ϕ2=35°) appeared. The recrystallization heat treatment temperature affected the rate of recrystallization but not the texture characteristics per se. During the subsequent grain growth stage, the recrystallization texture component increased. This behavior was attributed to the growth of larger-than-average grains of this particular crystal orientation.The evolution of microstructure and texture during cold rolling and recrystallization annealing of commercial-purity Ti (CP-Ti) was established. Cold rolling to 40% reduction activated mechanical twinning- mostly > 3 2 11 < } 2 2 11 { compressive twins and > 1 1 10 < } 2 1 10 { tensile twins. The formation of twins resulted in an inhomogeneous microstructure, in which only the localized regions containing twins were refined and the regions deformed by slip remained coarse. The twinned grains, containing high stored energy and numerous high-angle grain boundaries, became the preferential sites of nucleation during subsequent recrystallization. During recrystallization heat treatment at 500~700°C, the cold-rolling texture (ϕ1=0°, Φ=35°, ϕ2=30°) diminished in intensity, whereas a recrystallization texture component (ϕ1=15°, Φ=35°, ϕ2=35°) appeared. The recrystallization heat treatment temperature affected the rate of recrystallization but not the texture characteristics per se. During the subsequent grain growth stage, the recrystallization texture component increased. This behavior was attributed to the growth of larger-than-average grains of this particular crystal orientation.

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.

Effect of Temperature on Recrystallisation Texture and Microstructure for Non-Oriented Silicon Steel under Asymmetrically Rolling Process16

2011 ◽  
Vol 194-196 ◽  
pp. 1314-1318
Author(s):  
Zheng Gui Zhang ◽  
Yan Dong Liu ◽  
Fu Wang
Keyword(s):  
Grain Size ◽  
Texture Component ◽  
Recrystallization Texture ◽  
Deformation Texture ◽  
Silicon Steel ◽  
Effect Of Temperature ◽  
X Ray Diffraction ◽  
Texture Intensity ◽  
The Difference ◽  
Two Sides

The effect of temperature on the recrystallization texture and microstructure of non-oriented silicon steel under asymmetrically rolling condition was quantatively studied using X-ray diffraction technology. The results show that the texture component accumulates around {111}<112> when annealed at 800°C. Texture intensity is high and grain size is uniformly distributed between 50μm and 100μm with best magnetism. When annealed at 850°C and 900°C, texture component is scattered and the grain size is also bigger. However, for the annealing at 750°C, the texture component is similar to cold rolled process. The grain size is small and non-uniform, which is unfavorable to magnetism. The difference of forces along the fast and slow side of the roller results in different deformation texture and further affects the intensity of recrystallization texture along the two sides of the roller.

Recrystallisation Behaviour of an Fe-Mn-C-Si-Al TWIP

2012 ◽  
Vol 715-716 ◽  
pp. 649-654 ◽  
Author(s):  
Lieven Bracke ◽  
Nieves Cabañas-Poy
Keyword(s):  
Grain Size ◽  
Cold Rolling ◽  
Annealing Temperature ◽  
Twip Steel ◽  
Rolling Texture ◽  
Annealing Temperatures ◽  
Twip Steels ◽  
Cold Rolled ◽  
Main Components ◽  
Cold Rolling Texture

The static recrystallisation behaviour of cold rolled and annealed TWinning Induced Plasticity (TWIP) steels is important for its industrial production. The recrystallisation kinetics have been determined for an Fe-Mn-C-Si-Al TWIP steel using hardness measurements and microstructure analysis: it has been shown that recrystallisation progresses rapidly with increased annealing temperature. Recrystallisation was faster at higher cold reductions, and a smaller final grain size was observed at lower annealing temperatures. This indicates that the mechanism is nucleation dominated at lower temperatures; grain growth at higher temperatures appears similar for all reductions. The recrystallisation results in a crystallographic texture where the main components of the cold rolling texture are preserved in the final texture after annealing, although some randomisation was observed.

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