scholarly journals Secondary recrystallization behavior in magnetostrictive Fe-Ga thin sheets induced by nano-sized composite precipitates

AIP Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 035313
Author(s):  
Zhenghua He ◽  
Hongji Du ◽  
Yuhui Sha ◽  
Sihao Chen ◽  
Fang Zhang ◽  
...  
Keyword(s):  
Secondary Recrystallization ◽  
Thin Sheets ◽  
Recrystallization Behavior

scholarly journals Secondary Recrystallization Behavior in Fe-3%Si Grain-oriented Silicon Steel Produced by Twin-roll Casting and Simplified Secondary Annealing

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 660
Author(s):  
Yang Wang ◽  
Yuanxiang Zhang ◽  
Feng Fang ◽  
Xiang Lu ◽  
Guo Yuan ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Secondary Recrystallization ◽  
Laser Scanning Microscopy ◽  
Processing Route ◽  
Confocal Laser ◽  
Continuous Annealing ◽  
Pinning Force ◽  
Recrystallization Behavior ◽  
Twin Roll ◽  
Secondary Annealing

Grain-oriented silicon steels were produced by the shortest processing route involving twin-roll strip casting, two-stage cold rolling with intermediate annealing, and simulated continuous annealing. The secondary recrystallization behavior of grain-oriented silicon steels under different inhibition conditions was in-situ observed by combining the confocal laser scanning microscopy (CLSM) and electron backscattered diffraction (EBSD) techniques. The results revealed that the optimal temperature of secondary recrystallization showed a proportional relationship with the Zenner pinning force. In the case of weak pinning force, the abnormal grain growth occurred quickly at ~1050 °C. The corresponding growth rates were in the range of 60–1400 μm/min and decreased gradually as the secondary recrystallization proceeded. In the case of strong pinning force, the incubation time and onset temperature of the secondary recrystallization was significantly increased, but the total time of the secondary recrystallization was obviously shortened from 685 s to 479 s, and the final magnetic induction of B8 was increased from 1.7 T to 1.85 T. After the secondary annealing, some island grains and coarse primary grains were retained. The formation of island grain was related to the low migration of grain boundaries. The findings of coarse γ- grains indicated that the primary grain size also played a crucial role during secondary recrystallization, apart from the primary recrystallized texture, which attracted more attention previously.

scholarly journals Rapid Secondary Recrystallization of the Goss Texture in Fe81Ga19 Sheets Using Nanosized NbC Particles

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3818
Author(s):  
Fan Lei ◽  
Yuhui Sha ◽  
Zhenghua He ◽  
Fang Zhang ◽  
Liang Zuo
Keyword(s):  
Recrystallization Texture ◽  
Secondary Recrystallization ◽  
Nitrogen Atmosphere ◽  
Primary Recrystallization ◽  
Recrystallization Annealing ◽  
Thin Sheets ◽  
Intermediate Annealing ◽  
Pure Nitrogen ◽  
Goss Texture ◽  
Magnetostriction Coefficient

Herein, a simple and efficient method is proposed for fabricating Fe81Ga19 alloy thin sheets with a high magnetostriction coefficient. Sharp Goss texture ({110}<001>) was successfully produced in the sheets by rapid secondary recrystallization induced by nanosized NbC particles at low temperatures. Numerous NbC precipitates (size ~90 nm) were obtained after hot rolling, intermediate annealing, and primary recrystallization annealing. The relatively higher quantity of nanosized NbC precipitates with 0.22 mol% resulted in finer and uniform grains (~10 μm) through thickness after primary recrystallization annealing. There was a slow coarsening of the NbC precipitates, from 104 nm to 130 nm, as the temperature rose from 850 °C to 900 °C in a pure nitrogen atmosphere, as well as a primary recrystallization textured by strong γ fibers with a peak at {111} <112> favoring the development of secondary recrystallization of Goss texture at a temperature of 850 °C. Matching of the appropriate inhibitor characteristics and primary recrystallization texture guaranteed rapid secondary recrystallization at temperatures lower than 950 °C. A high magnetostriction coefficient of 304 ppm was achieved for the Fe81Ga19 sheet after rapid secondary recrystallization.

Secondary recrystallization and magnetostriction in binary Fe81Ga19 thin sheets

2016 ◽  
Vol 119 (12) ◽  
pp. 123904 ◽  
Author(s):  
Zhenghua He ◽  
Yuhui Sha ◽  
Quan Fu ◽  
Fan Lei ◽  
Fang Zhang ◽  
...  
Keyword(s):  
Secondary Recrystallization ◽  
Thin Sheets
Sign in / Sign up

Export Citation Format

Share Document