Phase-field study of spinodal decomposition under effect of grain boundary

• 作者: Ying-Yuan Deng Can Guo Jin-Cheng Wang Qian Liu Yu-Ping Zhao Qing Yang
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY
• 页码范围: 598-603
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abea9b

摘要

Grain boundary directed spinodal decomposition has a substantial effect on the microstructure evolution and properties of polycrystalline alloys.The morphological selection mechanism of spinodal decomposition at grain boundaries is a major challenge to reveal,and remains elusive so far.In this work,the effect of grain boundaries on spinodal decomposition is investigated by using the phase-field model.The simulation results indicate that the spinodal morphology at the grain boundary is anisotropic bicontinuous microstructures different from the isotropic continuous microstructures of spinodal decomposition in the bulk phase.Moreover,at grain boundaries with higher energy,the decomposed phases are alternating α/β layers that are parallel to the grain boundary.On the contrary,alternating α/β layers are perpendicular to the grain boundary.