The Influence of Annealing on the Microstructural and Textural Evolution of Cold-Rolled Er Metal

作者：Chen, Shiying; Wang, Yixuan; Zhang, Xiaowei^*; Li, Jinying; Li, Zongan; Yang, Wensheng; Wu, Daogao; Wang, Zhiqiang; Chen, Dehong; Mao, Ning

来源：Materials, 2022, 15(24): 8848.

DOI：10.3390/ma15248848

• erbium target
• annealing
• microstructure
• texture
• grain size

The microstructural and textural evolution of 60% cold-rolling-deformation Er metal (purity >= 99.7%) during annealing were investigated by electron-backscattered diffraction (EBSD) and X-ray diffraction (XRD). The research results showed that the texture of the (0001) plane orientation was strengthened, but there was no apparent enhancement of the (01 (1) over bar0 and ((1) over bar 2 (1) over bar0) plane orientations with increasing the annealing temperature. The recrystallization frequency and grain sizes gradually stabilized after the annealing duration of more than 1 h at 740 degrees C; the annealing duration and the recrystallization frequency were fitted to the equation: y = 1 - exp (-0.3269x(0.2506)). HAGBs were predominant, and the distribution of grain sizes was the most uniform after annealing at 740 degrees C x 1 h, which was the optimal annealing process of the Er metal with 60% cold-rolling deformation. However, the recrystallization was transferred to the substructure due to grain boundary migration and twining under an excessive annealing temperature and duration.