Affiliation:
1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University 1 , Xi'an 710072, People's Republic of China
2. Research & Development Institute of Northwestern Polytechnical University in Shenzhen 2 , Shenzhen, China
3. Collaborative Innovation Center of Northwestern Polytechnical University 3 , Shanghai, China
Abstract
Coarsening is a metallurgical process that is related to solute transmission and system energy decrease. However, for the coarsening behavior of the L12 precipitate in high-entropy alloys, the influence of moving boundary is still an open question. Here, we found the moving boundary accelerates the discontinuous coarsening of L12 phase. The multiple defects-accelerated diffusion and continual particle-capturing ability of the moving boundary provide a high-efficiency solute transport for the fast-coarsening kinetics of L12 phase. In addition, a boundary-encountered assisted precipitate formation mechanism is also validated in the recrystallized area.
Funder
the National Natural Science Foundation of China
the Guangdong Basic and Applied Basic Research Foundation
the Shanghai Phosphor Science Foundation
Fundamental Research Funds for the Central Universities
the Research Fund of the State Key Labortory of Solidification Processing, China
Young Elite Scientists Sponsorship program by CAST
the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University