1. Effect of two-step thermomechanical processing on grain boundary character distribution of CoCrFeMnNi high-entropy alloy
- Author
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Qunhua Tang, Hao Wang, Guo Keke, Pinqiang Dai, Chunfu Hong, Xiaoqiang Liu, and Weiguo Wang
- Subjects
010302 applied physics ,Materials science ,Condensed matter physics ,Annealing (metallurgy) ,Mechanical Engineering ,Two step ,Alloy ,02 engineering and technology ,engineering.material ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Mechanics of Materials ,Coincident ,Lattice (order) ,0103 physical sciences ,engineering ,Thermomechanical processing ,General Materials Science ,Grain boundary ,0210 nano-technology ,Electron backscatter diffraction - Abstract
The influence of annealing time and secondary-rolling reduction ratio on grain boundary character distribution (GBCD) in an FCC CoCrFeMnNi high-entropy alloy were investigated via electron backscatter diffraction (EBSD). The results show that the processing of 10% cold-rolling reduction subsequently with annealing at 1073 K for 10 h induces a high frequency of low coincident site lattice (CSL) boundary with >70%, thereby effectively achieving GBCD optimization. As annealing time increases, low-Σ CSL (Σ ≤29) boundary frequency first decreases and then remains constant at approximately 60%. The secondary-rolling reduction ratio followed by annealing at 1073 K for 10 h also exerts a substantial influence on GBCD. As the reduction ratio increases from 6% to 40%, the low-Σ CSL (Σ ≤29) boundary frequency first increases and then decreases.
- Published
- 2019
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