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Microstructure and Texture of Ni7W/Ni12W/Ni7W Composite Substrates at Different Intermediate Annealing Temperatures
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College of Materials Science and Engineering,Beijing University of Technology,College of Materials Science and Engineering,Beijing University of Technology,College of Materials Science and Engineering,Beijing University of Technology,College of Materials Science and Engineering,Beijing University of Technology,College of Materials Science and Engineering,Beijing University of Technology,College of Materials Science and Engineering,Beijing University of Technology

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the National Natural Science Foundation of China(51571002), Beijing Municipal Natural Science Foundation(2172008),the Doctoral Program of Higher Education of Special Research Fund (20121103110012), Beijing Municipal Natural Science Foundation B Type (KZ201310005003), Program of Beijing City and Beijing University of Technology

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    Abstract:

    Ni7W/Ni12W/Ni7W composite substrates for YBa2Cu3O7-δ coated conductors were prepared by rolling assisted biaxially textured substrates route. A threefold intermediate annealing at different temperatures was introduced in the rolling process of Ni7W/Ni12W/Ni7W composite substrates to better its deformation texture. The recovery microstructure and the deformation texture of latitude and longitude section were studied with X-ray diffraction and electron backscattered diffraction to reveal the possible mechanism of temperature effects on rolling and strong cube texture formation processes. The results show that the highest cube area fraction is found in sample intermediately annealed at 600S°C/60Smin, in this way Ni7W/Ni12W/Ni7W composite substrates with high cube texture content of 95% (<10°) are obtained at a low recrystallization annealing temperature. Crystal orientation maps reveal that a higher amount of cube orientation exists in its recovery and initial recrystallization samples. Point to point misorientation files confirms the high grain boundary angle of these cube grains, which strongly boost the cube texture formation during subsequent recrystallization.

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[Liu Jing, Suo Hongli, Ma Lin, Yu Dan, Cui Jin, Ji Yaotang. Microstructure and Texture of Ni7W/Ni12W/Ni7W Composite Substrates at Different Intermediate Annealing Temperatures[J]. Rare Metal Materials and Engineering,2018,47(10):2936~2941.]
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History
  • Received:March 28,2017
  • Revised:May 05,2017
  • Adopted:May 16,2017
  • Online: November 08,2018
  • Published: