一步再结晶对CoCrFeMnNi高熵合金及其子体系晶界演变的影响。

Chen Bo-Ru, Yeh An-Chou, Yeh Jien-Wei

Department of Materials Science and Engineering, National Tsing Huang University, Hsinchu, Taiwan 30013, ROC.

Sci Rep. 2016 Feb 29;6:22306. doi: 10.1038/srep22306.

In this study, the grain boundary evolution of equiatomic CoCrFeMnNi, CoCrFeNi, and FeCoNi alloys after one-step recrystallization were investigated. The special boundary fraction and twin density of these alloys were evaluated by electron backscatter diffraction analysis. Among the three alloys tested, FeCoNi exhibited the highest special boundary fraction and twin density after one-step recrystallization. The special boundary increment after one-step recrystallization was mainly affected by grain boundary velocity, while twin density was mainly affected by average grain boundary energy and twin boundary energy.

在本研究中，对等原子CoCrFeMnNi、CoCrFeNi和FeCoNi合金一步再结晶后的晶界演变进行了研究。通过电子背散射衍射分析评估了这些合金的特殊晶界分数和孪晶密度。在所测试的三种合金中，FeCoNi在一步再结晶后表现出最高的特殊晶界分数和孪晶密度。一步再结晶后的特殊晶界增量主要受晶界速度影响，而孪晶密度主要受平均晶界能和孪晶界能影响。