Evolution of Cube Texture in Cu-45at.%Ni Alloy Substrates for YBCO Coated Conductors

2015 ◽  
Vol 778 ◽  
pp. 105-109
Author(s):  
Hui Tian ◽  
Yi Wang ◽  
Pan Wang ◽  
Ya Ru Liang ◽  
Lin Ma ◽  
...  
Keyword(s):  
Grain Growth ◽  
Texture Evolution ◽  
Cube Texture ◽  
Rolling Texture ◽  
Coated Conductors ◽  
Recrystallization Process ◽  
Ni Alloy ◽  
Back Scattering ◽  
Cold Rolled ◽  
Ybco Coated Conductors

The cube texture evolution during annealing of the heavy cold-rolled Cu-45at.%Ni alloy tapes were investigated by XRD and electron back scattering diffraction techniques. The results indicated that the fraction of Copper-type rolling texture was slightly strengthened during recovery, and then strongly reduced during recrystallization. The cube texture was formed by consuming the rolling texture components during recrystallization process, and the S, Copper and Brass orientations were consumed together via cube grain growth. A strong cube-textured Cu-45at.%Ni alloy substrate with the cube texture fraction of 98.6 % (< 10°) was obtained after annealing at 1000 oC for 1 h.

Recrystallization of Nickel and Ni Alloy Substrates for YBCO Coated Conductors

2000 ◽  
Vol 659 ◽  
Author(s):  
Rainer Nast ◽  
Bernhard Obst ◽  
Wilfried Goldacker ◽  
Wolfgang Schauer
Keyword(s):  
Grain Growth ◽  
Volume Fraction ◽  
Secondary Recrystallization ◽  
Cube Texture ◽  
High Volume ◽  
Coated Conductors ◽  
Recrystallization Temperature ◽  
Cube Orientation ◽  
Ni Alloy ◽  
Kinetics Of

ABSTRACTTo avoid grain boundary grooving and abnormal grain growth during recrystallization of nickel and Ni alloy substrate tapes, the commonly used high recrystallization temperatures must be lowered.The development of the cube orientation is a nucleation-growth process. So the kinetics of the cube recristallization is strongly temperature dependent, and there is a very marked effect of the stacking fault energy (SFE) of the specific alloy on the activation energy. Concurrently with measurements of the formation kinetics of the cube orientation, the recrystallization texture of Ni (+99,99 wt.%), NiCr10 wt.% and NiMn10 wt.% tapes in dependence on the deformation history, the annealing temperature and time was investigated. Profile rolling to a rectangular rod, without further high temperature annealing, leads to a worse cube texture compared to round swaged rods with an in-plane 200 peak splitting. The increase of the recrystallization temperature and time sharpens the texture due to grain growth, limited by the occurrence of secondary recrystallization when a sample specific temperature is exceeded.In binary Ni alloys the commonly used alloying elements reduce the SFE. This favors the formation of recrystallization twins {122}<212> obstructing the oriented coating. In Mn alloyed tapes this effect is strongly pronounced. The tapes show a good cube texture, but also a high volume fraction of twins due to the low SFE. To suppress the twin formation we investigated ternary Ni based alloys with respect to possibly increased SFE and report first results.

Texture Evolution in Ni Substrate Prepared by Powder Metallurgy and Casting Methods

2007 ◽  
Vol 534-536 ◽  
pp. 1605-1608
Author(s):  
Jun Hyung Lim ◽  
Kyu Tae Kim ◽  
Eui Cheol Park ◽  
Jin Ho Joo ◽  
Hyoung Sub Kim ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Annealing Temperature ◽  
Texture Evolution ◽  
Cube Texture ◽  
Coated Conductors ◽  
Reduction Ratio ◽  
The Other ◽  
X Ray ◽  
Ni Substrate ◽  
Ybco Coated Conductors

Cube textured Ni substrate were fabricated for YBCO coated conductors from the initial specimens prepared by powder metallurgy (P/M) and casting and the effects of annealing temperature and reduction ratio on texture formation and microstructural evolutio were evaluated. The initial specimens were rolled by 98.6% and 99.2% reduction ratio and then annealed in the temperature range of 600°C to 1200°C. The microstructure and texture were evaluated by optical microscopy and X-ray pole-figure analysis. We observed that microstructure of the initial specimen varied with preparation methods.Texture analysis indicated that a strong cube texture formed for substrate made by P/M, and the degree of texture did not significantly vary with annealing temperature of 600°C~1100°C. On the other hand, the texture of substrate made by casting was more dependent on the annealing temperature and twin texture ({221}<221>) and several minor texture components started to form at 1000°C. In addition, the texture of substrate made by P/M was significantly dependent on the reduction ratio.

Recrystallization Processing of Cold-Rolled Nickel

2004 ◽  
Vol 819 ◽  
Author(s):  
I. Baker ◽  
H. Chang ◽  
J. Li
Keyword(s):  
Grain Growth ◽  
Isothermal Annealing ◽  
Secondary Recrystallization ◽  
Cube Texture ◽  
Rolling Texture ◽  
Primary Recrystallization ◽  
The Other ◽  
Columnar Grains ◽  
Cold Rolled ◽  
Initial Texture

AbstractWe have examined the effects of isothermal annealing, at a variety of temperatures, and directional annealing, under a range of conditions, on both primary recrystallization and secondary recrystallization in 90% cold-rolled 99.5% nickel of two different textures. The initial texture is shown to influence the rolling texture and, hence, the results of subsequent annealing. It was found that one alloy showed a cube texture after primary recrystallization, underwent abnormal grain growth upon annealing at high temperatures, and could be directionally (secondary) recrystallized to give large columnar grains. In contrast, the other alloy produce a weak cube texture after primary recrystallization, showed only normal grain growth upon annealing at higher temperatures, and could not be directionally annealed to produce columnar grains. The implications of these results are discussed for producing columnar grains.

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.

scholarly journals Texture Evolution during Recrystallization and Grain Growth in Non-Oriented Electrical Steel Produced by Compact Strip Production Process

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 197
Author(s):  
Jun-Qiang Cong ◽  
Fei-Hu Guo ◽  
Jia-Long Qiao ◽  
Sheng-Tao Qiu ◽  
Hai-Jun Wang
Keyword(s):  
Grain Growth ◽  
Electrical Steel ◽  
Texture Evolution ◽  
Fiber Texture ◽  
Rolled Sheet ◽  
Recrystallization Process ◽  
Columnar Crystal ◽  
Compact Strip Production ◽  
Cold Rolled ◽  
Strip Production

Evolution of texture and α*-fiber texture formation mechanism of Fe-0.65%Si non-oriented electrical steel produced by Compact Strip Production (CSP) process during all the thermo-mechanical processing steps were investigated using electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) techniques. Columnar crystal structure of cast slab is fine and well-developed. Textures of the hot-rolled band are quite different in the thickness direction. During annealing of cold-rolled sheet, γ-fiber texture grains would nucleate and grow preferentially, and α*-fiber texture grains mainly nucleate and grow in the shear zone of α-fiber texture of cold-rolled sheet. During the recrystallization process, γ-fiber texture gradually concentrated to {111}<112>, and γ and α*-fiber texture increased significantly. {111}<112> texture priority nucleation at the initial stage of recrystallization. Due to the advantages of nucleation position and quantity, the content of α*-fiber texture is greater than {111}<112> texture in the mid-recrystallization. During grain growth process, {111}<112> oriented grains would grow selectively by virtue of higher mobility, sizes and quantity advantages than that of {411}<148 > and {100}<120>, resulting in the gradual increase of γ-fiber texture and the decline of α *-fiber texture.

Cube Texture Formation of Cu-33at.%Ni Alloy Substrates and CeO2 Buffer Layer for YBCO Coated Conductors

2014 ◽  
Vol 887-888 ◽  
pp. 345-348 ◽  
Author(s):  
Hui Tian ◽  
Hong Li Suo ◽  
Ya Ru Liang ◽  
Yue Zhao ◽  
Lin Ma ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Full Width Half Maximum ◽  
Cube Texture ◽  
Coated Conductors ◽  
Texture Formation ◽  
Solution Deposition ◽  
X Ray ◽  
Ni Alloy ◽  
Electron Back Scattered Diffraction ◽  
Ybco Coated Conductors

Cube texture formation of Cu-33 at.%Ni alloy substartes and CeO2buffer layer prepared by chemical solution deposition on the textured substrate were investigated by electron back scattered diffraction (EBSD) and XRD technics systematically. The results shown that a strong cube textured Cu-33at.%Ni alloy substrate with the cube texture fraction of 99.8 % (< 10°) was obtained after annealing at 1000°C for 1 h. The full width half maximum (FWHM) values for the X-ray (111) phi-scan and (002) omega-scan in this substrate were 7.31° and 5.51°, respectively. Furthermore, the cube texture fraction of epitaxially grown CeO2buffer layer was 95 % (< 10°), and the FWHM values of phi-scan and omega-scan being 6.98° and 5.92°, respectively.

Texture and Ductility of Ni3Al Foils

2011 ◽  
Vol 306-307 ◽  
pp. 116-119
Author(s):  
Masahiko Demura ◽  
Ya Xu ◽  
Toshiyuki Hirano
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
Memory Effect ◽  
Texture Evolution ◽  
High Mobility ◽  
Two Stage ◽  
Texture Memory ◽  
Highly Effective ◽  
Cold Rolled

This article presents the texture evolution and the ductility improvement of the cold-rolled foils of boron-free Ni3Al during the recrystallization and the subsequent grain growth. The cold-rolled foils had sharp {110} textures. After the recrystallization at 873K/0.5h, the texture was disintegrated with several texture components. Interestingly, most of them had a single rotation relationship. i.e. 40˚ around <111>. With the progress of the grain growth, however, the texture returned to the sharp, cold-rolled textures. This two-stage texture evolution, called as “Texture memory effect”, was explained assuming a high mobility of the grain boundary with the 40˚<111> rotation relationship. The texture returning was highly effective to improve the ductility of the foils.

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