Strong Cube Texture Formation in Heavily Cold-Rolled Ni8W/Ni12W/Ni8W Composite Alloy Substrates Used in YBCO Coated Conductors

2019 ◽  
Author(s):  
Yaotang Ji ◽  
Hongli Suo ◽  
ZiLi Zhang ◽  
Lin Ma ◽  
Jiazhi Li ◽  
...  
Keyword(s):  
Cube Texture ◽  
Coated Conductors ◽  
Texture Formation ◽  
Composite Alloy ◽  
Cold Rolled ◽  
Ybco Coated Conductors

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.

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.

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.

In Situ EBSD Study of Stable Cube Texture in an Advanced Composite Substrate Used in YBCO-Coated Conductors

2020 ◽  
Vol 26 (3) ◽  
pp. 365-372
Author(s):  
Yaotang Ji ◽  
Hongli Suo ◽  
ZiLi Zhang ◽  
Lin Ma ◽  
Jiazhi Li ◽  
...  
Keyword(s):  
Yield Strength ◽  
Cube Texture ◽  
Strain Curve ◽  
Coated Conductors ◽  
Buffer Layers ◽  
High Yield ◽  
Alloy Composite ◽  
Composite Substrates ◽  
Ybco Coated Conductors

AbstractAdvanced Ni8W/Ni12W/Ni8W alloy composite substrates used in YBCO-coated conductors with a strong cube texture and high yield strength have been fabricated, and a CeO2 buffer layer film was successfully deposited on the composite substrates. Through in situ tensile testing coupled with electron backscattered diffraction (EBSD) analysis, the stability of the cube texture of Ni8W/Ni12W/Ni8W alloy composite substrates has been investigated. The stress–strain curve shows that the yield strength (at 0.2% strain) of the composite substrates exceeds 250 Mpa. The orientation of grains and boundaries on the surface of the substrates was almost unchanged, while the strain exceeds 0.2%, which indicated that the composite substrates are adequate for depositing buffer layers and YBCO layers by the reel-to-reel process.

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 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.

Influence of High Energy Ball Mill Technology on Cube Texture Formation of Ni-8at.%W Alloy Substrates for YBCO-Coated Conductors

2014 ◽  
Vol 887-888 ◽  
pp. 1323-1327
Author(s):  
Yi Chen Meng ◽  
Hong Li Suo ◽  
Hui Tian ◽  
Lin Ma ◽  
Yi Wang ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Electron Backscatter Diffraction ◽  
Cube Texture ◽  
High Energy ◽  
Coated Conductors ◽  
Recrystallization Annealing ◽  
Texture Formation ◽  
Powder Metallurgy Process ◽  
High Energy Ball Mill ◽  
Backscatter Diffraction

Ni8W alloy ingots were prepared by SPS technic, followed by homogenizing, cold rolling and recrystallization annealing. The influence of ball milling on cold rolling and cube texture formation of Ni8W alloy substrates was investigated during the course of preparation. Finally, high quality cube-textured Ni8W alloy substrates were successfully obtained using this powder metallurgy process, and characterized by electron backscatter diffraction technic. It indicated that the cube texture fraction was as high as 90% (<10o) when it annealed at 1350°C for 2 h.

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.

Sharpening of Cube Texture during Grain Growth in High Purity Aluminum

2004 ◽  
Vol 467-470 ◽  
pp. 899-904
Author(s):  
Takeshi Murakami ◽  
Shouichi Ochiai
Keyword(s):  
Heating Rate ◽  
Grain Growth ◽  
High Purity ◽  
Cube Texture ◽  
Electrolytic Capacitor ◽  
Lattice Rotation ◽  
Texture Formation ◽  
High Purity Aluminum ◽  
Cold Rolled ◽  
Sharp Cube Texture

Grain growth in cube-textured aluminum was investigated by transmission Laue photographs obtained at the same point in specimens with progressing annealing at the heating rate of 20 deg/h. High purity aluminum for electrolytic capacitor was cold rolled to 98 % reduction, and subsequently partially annealed at 230 °C for 6 h and rolled 22 % reduction. On the light rolling, asterisms toward RD were observed near by direct beam, suggesting that lattice rotation around TD was caused in cube grains by light rolling. After annealing to 300 deg, fine Laue spots were detected in the asterisms. Those fine spots were indexed as 100 spots due to diffraction in {100} nearly parallel to the ND-TD plane. After disappearance of Debye arcs due to diffraction in untransformed matrix, cube texture was observed with orientational spread around TD. With continuing annealing to 540 °C , grain growth occurred at the expense of cube grains whose orientations deviated from the exact cube orientation around TD , resulting in sharp cube texture formation.

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