scholarly journals Effect of cross cold rolling and annealing on microstructure and texture in pure nickel

2020 ◽  
Vol 59 (1) ◽  
pp. 252-263
Author(s):  
Lixia Wang ◽  
Xingpin Chen ◽  
Tianhong Luo ◽  
Haitao Ni ◽  
Lin Mei ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Cube Texture ◽  
Deformation Texture ◽  
Pure Nickel ◽  
Recrystallization Behavior ◽  
Oriented Growth ◽  
Cold Rolling And Annealing ◽  
Deformation Textures ◽  
Annealing Experiments

AbstractThe microstructure and texture in pure nickel were investigated during multi-step cross cold rolling (CCR) and subsequent annealing. It was found that the deformation texture in the CCR nickel was dominated by Brass and rotated Brass about normal direction (ND) (BsND) texture components, along with marginal cube textures. The resulted deformation textures had a significant effect on the recrystallization behavior. Annealing of the CCR nickel at 550°C for 1 h led to the formation of dominant <012> // ND fiber accompanied by minor rotated cube textures, rather than strong cube texture. Increasing the annealing temperature up to 800°C resulted in further enhancement of <012> // ND fiber textures. The possible reasons for recrystallization behavior in annealed CCR sample were discussed based on in-situ annealing experiments from two aspects of oriented nucleation and oriented growth theories.

Investigation Texture in Ni-W Alloy Substrates for Coated Conductors

2007 ◽  
Vol 546-549 ◽  
pp. 2015-2018
Author(s):  
Yue Zhao ◽  
Hong Li Suo ◽  
Min Liu ◽  
Dong He ◽  
Ying Xiao Zhang ◽  
...  
Keyword(s):  
Magnetic Property ◽  
Cold Rolling ◽  
Cube Texture ◽  
Rolling Process ◽  
Deformation Texture ◽  
Coated Conductors ◽  
High Quality ◽  
Alloy Substrate ◽  
Sharp Cube Texture

It is well know that Ni-5at.% W(Ni5W) and Ni-9.3at.% W(Ni9W) alloy substrates are two kinds of promising materials to be employed in coated conductors. The Ni5W substrate is very easy to produce cube texture, while the Ni9W alloy has a lower magnetic property and higher strength. However, the pure cube texture are not capable to be obtained in Ni9W alloy. In this work, the preparation and texture development in both Ni5W and Ni9W alloy substrates have been reported. Highly biaxial textured Ni5W substrate was fabricated by cold rolling, followed by three different annealing routes. The texture analysis indicated that a sharp cube texture was formed after annealing at a wide temperature range of 800-1100°C in as rolled Ni5W substrate. The high quality of cube orientation was obtained after a two step annealing (TSA) with farthing twin boundaries analyzed by EBSD. Furthermore, in order to obtain a pure cube texture in Ni9W alloy substrate, a typical rolling process was performed and the deformation texture was optimized in these substrates. The designed deformation texture components were obtained in Ni9W alloy when pre-heating the ingot at 250 °C before performing a cold rolling, which shows a possibility to form cube texture in Ni9W alloy substrate after annealing.

scholarly journals Influence of Rolling Temperature on the Perfection Degree of Recrystallization Cube Texture in Nickel

2001 ◽  
Vol 35 (1) ◽  
pp. 1-22 ◽  
Author(s):  
B. K. Sokolov ◽  
I. V. Gervasyeva ◽  
D. P. Rodionov ◽  
Yu. V. Khlebnikova ◽  
I. N. Stepanova ◽  
...  
Keyword(s):  
Room Temperature ◽  
Secondary Recrystallization ◽  
Cube Texture ◽  
Deformation Texture ◽  
Primary Recrystallization ◽  
Pure Nickel ◽  
Rolling Temperature ◽  
Different Temperatures ◽  
Kinetics Of ◽  
Thin Tape

The effect of the rolling temperature on the deformation texture and the perfection degree of a cube texture in pure-nickel thin tape were investigated. The kinetics of primary recrystallization was studied on samples that had undergone rolling at different temperatures and the temperature of the onset of secondary recrystallization was determined. Regularities of the structure formation in the samples are discussed. It is established that the cube texture with the maximum sharpness is produced in the samples rolled at room temperature.

scholarly journals Development of Cube Texture in Coarse Grained Copper

1990 ◽  
Vol 12 (1-3) ◽  
pp. 37-46 ◽  
Author(s):  
M. Sindel ◽  
G. D. Köhlhoff ◽  
K. Lücke ◽  
B. J. Duggan
Keyword(s):  
Grain Size ◽  
Size Effects ◽  
Cube Texture ◽  
Rolling Texture ◽  
Rolling Reduction ◽  
Coarse Grained ◽  
Oriented Growth ◽  
Size Dependent ◽  
Deformation Textures ◽  
Oriented Material

Cube oriented deformed material has been detected in the rolling texture measured on edge sections of heavily rolled coarse grained copper. The level of intensity is low, and seems to be independent of rolling reduction over the range 93–98%. Recrystallization textures show an increasing strength of Cube with rolling reduction. The evidence is consistent with the idea that Cube nuclei are created by a mechanism similar to that proposed by Dillamore and Katoh, and the strength of the recrystallized Cube texture depends on oriented growth. Prior grain size effects are briefly examined and it is shown that deformation textures are less sharp in large grain size compared with small grain sized copper at similar strains. It is likely that the effect of grain size on cube texture formation arises from grain size dependent texture changes in the vicinity of the deformed Cube oriented material.

TEM Investigations of Titanium Processed by ECAP Followed by Cold Rolling

2006 ◽  
Vol 503-504 ◽  
pp. 805-810 ◽  
Author(s):  
Bernhard Mingler ◽  
V.V. Stolyarov ◽  
Michael Zehetbauer ◽  
Wolfgang Lacom ◽  
Hans Peter Karnthaler
Keyword(s):  
Cold Rolling ◽  
Room Temperature ◽  
High Strength ◽  
Tensile Tests ◽  
Coarse Grained ◽  
Angular Pressing ◽  
Transmission Electron ◽  
Cp Ti ◽  
Annealing Experiments

Conventional coarse grained (CG) commercial pure (CP) Ti Grade 2 was studied after cold rolling (CR) at room temperature, and after equal channel angular pressing (ECAP) at 450° C followed by CR, by transmission electron microscopy (TEM) methods. CR of the CG material leads to a microstructure showing initially twins with (0112) type and later subgrains separated by lowangle grain boundaries. CR carried out after ECAP yields the fragmentation of fine grains (300 – 800 nm) mostly bounded by high-angle boundaries into elongated subgrains (~ 100 nm). It was shown with in-situ annealing experiments in the TEM that this microstructure is thermally stable up to a temperature of 450° C. Tensile tests showed that the combination of ECAP with CR has the potential to produce at the same time high strength (941 MPa) and high ductility (16.7%).

scholarly journals Evolution of Microstructure, Texture and Topography during Cold Rolling and Recrystallization of Ni–5at.%W Alloy Substrate for Coated Conductors

Crystals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 604
Author(s):  
Chenxi Zhang ◽  
Hongli Suo ◽  
Zili Zhang ◽  
Qiuliang Wang ◽  
Yingxia Wang ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Direction ◽  
Large Angle ◽  
Cube Texture ◽  
Deformation Texture ◽  
Coated Conductors ◽  
Recrystallization Process ◽  
Alloy Substrate ◽  
Rolling Orientation ◽  
Cold Rolled

In this work, the effect of cold rolling and heat treatment upon the microstructure and texture of the surface layer and cross-section of Ni5W alloy substrate was analyzed via the EBSD technique. A typical copper deformation texture was shown by the cold-rolled Ni5W alloy substrate. The cube-oriented nuclei were attributed to the rolling direction–transverse direction (RD-TD) plane due to the presence of copper and S rolling textures. Typical large-shape cold-rolled microstructure was presented by the RD-ND surface in the cube-oriented area. During the recrystallization process, the cube-oriented grains did not have a nucleation quantity advantage, but they did have an obvious growth advantage compared with other orientation grains. They can form a strong cube texture by absorbing the random orientation and rolling orientation through the migration of large-angle grain boundaries.

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.

Effect of Severe Cold-Rolling and Subsequent Annealing on Microstructure and Properties of in-Situ Composite Steel

2010 ◽  
Vol 667-669 ◽  
pp. 157-160
Author(s):  
Jun Zhao ◽  
Han Zhang ◽  
Yong Ming Yang ◽  
Jiu Chuan Chen ◽  
Quan Xing Wen ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Lath Martensite ◽  
Rolling Plane ◽  
Subsequent Annealing ◽  
Rolled Sample ◽  
In Situ Composite ◽  
Cold Rolling And Annealing ◽  
Cold Rolled ◽  
Equiaxed Grains

In this paper, the process of severe cold-rolling and annealing for Q235 steel with lath martensite has demonstrated a new promising technique for producing in-situ composite multi-nanolayer steel. Cold rolling and subsequent annealing have great impact on microstructure evolution as well as mechanical properties. In the as-rolled state, the strength (b 2112 MPa) is approximately four times increased than as-received material, which is attributed to work hardening and grain refining during cold rolling. As cold-rolled sample subjected to further annealing below 500 °C, deformed microstructure underwent further recovery and recrystallization and finally became refined equiaxed grains; ultrafine ferrite grains, nano-carbides precipitated uniformly were seen in the specimen annealed at 500 °C, and the phenomenon of fracture delamination was observed from the specimens, the delamination plane was parallel to the rolling plane, in-situ composite weak interfaces effect has great impact on the fracture surface. Annealing at and above 600 °C resulted in coarse ferrite grains with spheroidized coarse carbides, causing grain growth.

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