Development of textured coated superconductor substrate tapes by severe plastic deformation processing

Bhattacharjee, Pinaki Prasad and Tsuji, N (2011) Development of textured coated superconductor substrate tapes by severe plastic deformation processing. In: 5th International Conference on Nanomaterials by Severe Plastic Deformation, NanoSPD5, 21-25, March 2011, Nanjing; China.

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An attempt has been made to fabricate highly cube textured ({001}<100>) polycrystalline nickel substrate tapes for coated superconductor applications using severe plastic deformation route. For this purpose high purity Ni (∼99.97%) plates with widely different average grain size (28 μm or fine grained starting material and 650 μm or coarse grained starting material, respectively) are severely deformed by Accumulative Roll Bonding (ARB) up to an equivalent strain level of (εeq = 6.4) and annealed at various temperatures between 300° to 800°C for one hour. Upon annealing at different temperatures, the fine grained starting material developed a much stronger cube texture than the coarse grained starting material. By suitable annealing treatment near 100% cube textured tape could be obtained in the SPD processed fine grained nickel tapes having a predominantly low angle boundary network. The observed difference in the strength of cube texture in the two materials could be explained based on the oriented nucleation mechanism of formation of cube texture. The present results indicate that SPD processing route such as ARB is very effective in fabricating high purity Ni or Ni alloys intended for coated superconductor substrate applications.

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IITH Creators:
IITH CreatorsORCiD
Bhattacharjee, Pinaki Prasad
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Nickel; Recrystallization; Severe plastic deformation; Texture
Subjects: Materials Engineering > Materials engineering
Divisions: Department of Material Science Engineering
Depositing User: Team Library
Date Deposited: 07 Nov 2014 06:37
Last Modified: 31 Aug 2017 06:49
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