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

• Published in: Materials Vol. 15; no. 24; p. 8848
• Main Authors: Chen, Shiying, Wang, Yixuan, Zhang, Xiaowei, Li, Jinying, Li, Zongan, Yang, Wensheng, Wu, Daogao, Wang, Zhiqiang, Chen, Dehong, Mao, Ning
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 11.12.2022; MDPI
• Subjects: Analysis; Annealing; Cold; Cold rolling; Crystals; Deformation; Electron backscatter diffraction; Erbium; erbium target; Evolution; Founding; Grain boundaries; Grain boundary migration; Grain size; Grain size distribution; Metals; Microstructure; Rare earth metals; Recrystallization; Structure; Temperature; texture; China; erbium target; grain size; microstructure; annealing; texture
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15248848

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 (011¯0) and (1¯21¯0) 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 °C; the annealing duration and the recrystallization frequency were fitted to the equation: y=1 − exp (−0.3269x0.2506). HAGBs were predominant, and the distribution of grain sizes was the most uniform after annealing at 740 °C × 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.