PREPARATION AND CHARACTERIZATION OF BIAXIALLY TEXTURED METALLIC SUBSTRATES FOR HTS COATED CONDUCTORS

2000 ◽  
Vol 14 (25n27) ◽  
pp. 3139-3144 ◽  
Author(s):  
A. TUISSI ◽  
R. MASINI ◽  
E. VILLA ◽  
J. E. EVETTS
Keyword(s):  
Ybco Film ◽  
Low Cost ◽  
Cube Texture ◽  
Primary Recrystallization ◽  
Coated Conductors ◽  
Arc Furnace ◽  
High Critical Current Density ◽  
Metallic Substrates ◽  
Cold Rolled

CuNi, NiCr, NiV alloys and pure Ni have been processed to obtain metallic substrates for high critical current density YBCO film depositions. High purity alloys were prepared using plasma arc furnace and the material was cold rolled to low thickness tapes. For all the tapes the (100)[001] cube alignment was induced by a primary recrystallization heat treatment after heavy cold rolling (RABITS). Besides the cube texture a good substrate should be smooth, thin, strong, non magnetic, resistant to oxidation, cold workable and low cost. In this work mechanical, magnetic and oxidation resistance properties of the prepared textured substrates were measured and compared.

Recrystallization and cube texture formation in heavily cold-rolled Ni7W alloy substrates for coated conductors

2015 ◽  
Vol 30 (10) ◽  
pp. 1686-1692 ◽  
Author(s):  
Yaru Liang ◽  
Hui Tian ◽  
Hongli Suo ◽  
Pan Wang ◽  
Yichen Meng ◽  
...  
Keyword(s):  
Cube Texture ◽  
Coated Conductors ◽  
Texture Formation ◽  
Cold Rolled ◽  
Image Position

Abstract

Cube Texture Formation in Ni-8at.%W Alloy Substrates Effected by the Initial Grain Size of Ingot

2015 ◽  
Vol 1105 ◽  
pp. 195-199
Author(s):  
Yi Chen Meng ◽  
Hong Li Suo ◽  
Hui Tian ◽  
Lin Ma ◽  
Yi Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Critical Current Density ◽  
Cold Rolling ◽  
Current Density ◽  
Cube Texture ◽  
Coated Conductors ◽  
Texture Formation ◽  
High Critical Current Density ◽  
High Quality ◽  
Ybco Coated Conductors

The high critical current density of YBCO-coated conductors prepared by rolling assisted biaxially textured substrate technic is mostly based on the high quality cube-textured substrates. In this paper, the effect of initial grain size of ingot on the microstructure and texture evolutions during cold rolling has been investigated in high alloyed Ni8W ingots, which can affect the cube texture formation in Ni8W alloy substrates subsequently. Finally, high quality cube texture had been obtained in Ni8W alloy substrate with fine initial grain size prepared by advanced SPS technology.

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.

Texture Formation in Thin Tapes from Ni-Based Ternary Alloys with Cr, W, Mo and V

2011 ◽  
Vol 702-703 ◽  
pp. 908-911
Author(s):  
I.V. Gervasyeva ◽  
Dmitrii Rodionov ◽  
Yulia Khlebnikova
Keyword(s):  
Cube Texture ◽  
Quantitative Relationship ◽  
Orientation Distribution ◽  
Primary Recrystallization ◽  
Distribution Functions ◽  
Ternary Alloys ◽  
High Annealing ◽  
Cold Rolled ◽  
Sharp Cube Texture ◽  
Thin Tape

Texture, structure, and magnetic and mechanical properties of thin tape substrates fabricated of ternary nickel alloys with chromium, tungsten, molybdenum, and vanadium have been investigated. It has been shown that in Ni93.8Cr4.0Mo2.2, Ni88.5Cr6.2V5.3and Ni88.4Cr9.2W2.4 alloys a sharp cube texture can form, which is stable up to high annealing temperatures. In the Ni87.6Cr8.0Mo4.4alloy, other weak orientations are present, along with the strong cube component. The possibility of obtaining a sharp cube texture after primary recrystallization is controlled by the quantitative relationship between the texture components in a cold-rolled tape, which is determined by the method of orientation-distribution functions. Three alloys studied are non-magnetic at 77 K.

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.

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.

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.

Preparation and Characterization of Cube-Textured Ni-5 at.% W Substrates for Coated Conductors

2013 ◽  
Vol 537 ◽  
pp. 269-273
Author(s):  
Xing Pin Chen ◽  
Jing Peng Zhang ◽  
Xue Chen ◽  
Yong Bin Ji
Keyword(s):  
Grain Size ◽  
Cube Texture ◽  
Xrd Analysis ◽  
Coated Conductors ◽  
Coated Conductor ◽  
High Temperature Annealing ◽  
Full Width ◽  
Half Maximum ◽  
Out Of Plane

The goal of present study was to manufacture and characterize the Ni-5 at.% W alloy substrates for coated conductor applications with a strong cube texture. Cube-textured Ni-5 at.% W alloy substrates were fabricated by heavy cold rolling (98%) and a high temperature annealing (1200°C). From the EBSD and XRD analysis of the fully recrystallized tapes, the cube texture component in the tape was found to reach a proportion as high as 99.5% within a tolerance angle of less than 9o, while the FWHM (full width at half maximum) values of the out-of-plane and in-plane textures are about 5.8o and 6.9o, respectively. Moreover, the grain size distribution is homogeneous, and there is a large amount of low angle grain boundaries (95.6%). This process is very suitable for preparation of substrates for coated conductors.

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