1. The cube texture evolution of pure Ni during annealing
Liu Wei
Li xiaoling
Tsinghua University

2. Research background
Normal annealing
Electric field annealing
High magnetic field annealing

3. Research background
Rolling assisted biaxially textured substrates

4. YBCO coated superconductor

5. Nickel substrate
Pole figure of
{111} cube texture

6. Nickel substrate Good space distribution Strong cube texture Small
misorientation

7. Cube texture forming process
Rolling
reduction >95%
Recrystallization
Grain growth
Annealing

8. Electric field annealing
IF steel

9. Electric field annealing
Al-Li alloy annealing in 450C for 3h (a) E＝2 kV (b) E=0KV

10. High magnetic field annealing
IF steel
H=10 T
Retarded the recrystallization
Intensified the {100}<110> texture
Retarded the ND//<111> texture

11. High magnetic field annealing
Zn–1.1%Al alloy
H=32 T
Scripta Materialia 46 (2002) 857–862

12. High magnetic field annealing
Zn–1.1%Al alloy
H=32 T
without field;
oriented parallel to the field;
(c) tilted at +19° to
the field about the TD
(d) tilted at -19 ° to
the field about the TD.

13. Motivation
For superconductor substrate material cube texture and grain size are important
The evolution of cube texture
In normal annealing;
In an electric field annealing;
In a high magnetic field annealing.

14. Material Material： high pure Ni，purity is 99.999％ Reduction 98％
sample thickness is 90μm ND RD TD
90μm
1cm

15. Hardness curves for pure Ni annealed at 300ºC for different times
Normal annealing
Hardness curves for pure Ni annealed at 300ºC for different times

16. Cube texture evolution
Cube texture evolution of pure Ni annealed at 300ºC for different times

17. Grain size
Cube grain size and all grain size for pure Ni annealed at 300ºC for different times

18. Microstructure 300C-5min 300ºC-30min 300C-60min 300C-120min
Dark to light shading indicates grains with
orientations increasing
deviations
(up to 15)
to {001}<100>.
Fuchsia is cube grain, white is deviation more than 15º spread {100}<001>
300℃/20min
200℃/2h
300℃/5min
300℃/35min
300℃/60min
300℃/2h
OIM maps of pure Ni annealed at 300ºC for different times

19. Electric field annealing
Schematic illustration of the electric field annealing arrangement

20. Hardness Hardness curves for pure Ni annealed at 300ºC
for different times in two different conditions

21. Microstructure of pure Ni annealed at 300ºC for different times
300ºC-0min
300ºC-30min
300ºC-120min
(a)
(b)
(a) (b)
Microstructure of pure Ni annealed at 300ºC for different times
(a) E=0KV (b) E=2.0KV

22. Cube texture Cube texture fraction of pure Ni annealed at 300ºC
for different times in the two different conditions

23. Grain size Grain size of pure Ni annealed at 300ºC
for different times in the two different conditions

24. High magnetic field annealing
sample ND
Experiment parameter
H=10T
300℃/2h
The magnetic treatment sketch map

25. Angles choice

26. Cube texture (average)
The red line is the cube texture fraction without a magnetic field
Average cube texture fraction of different angles to magnetic direction annealed at 300℃ for 2h in H=10T magnetic field

27. Grain size
The red line is cube grain size and the green line is all grain size without magnetic field
The grain size of different angles to magnetic field annealed at 300℃ for 2h in H=10T magnetic field

28. Microstructure 300-2h-0(0º) 300-2h-2(24º) 300-2h-4(35º)
OIM maps of different angles to magnetic field annealed at 300℃ for 2h in H=10T magnetic field
300-2h-9(90º)
300-2h-2(24º)
300-2h-4(35º)
300-2h-8(57.6º)
300-2h-6(53.3º)

29. Conclusion
In normal annealing, with the annealing time increasing, the cube texture fraction and cube oriented grain size increase;
Annealing in an electric field leads to smaller grain size for given annealing conditions compared with results without electric field annealing;
Annealing in an high magnetic field is a complicated process which include the cube texture evolution and magnetic field effect.

30. T h a n k s