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Chin. Phys. B, 2021, Vol. 30(8): 088101    DOI: 10.1088/1674-1056/abea9b

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

Ying-Yuan Deng(邓英远)1, Can Guo(郭灿)1,†, Jin-Cheng Wang(王锦程)2, Qian Liu(刘倩)1, Yu-Ping Zhao(赵玉平)1, and Qing Yang(杨卿)1
1 School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China;
2 State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China
Abstract  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.
Keywords:  spinodal decomposition      grain boundary      phase-field method      pattern formation  
Received:  20 January 2021      Revised:  01 February 2021      Accepted manuscript online:  01 March 2021
PACS:  81.30.-t (Phase diagrams and microstructures developed by solidification and solid-solid phase transformations)  
  64.75.Nx (Phase separation and segregation in solid solutions)  
  68.35.Rh (Phase transitions and critical phenomena)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51801154), the Fund from the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University, China (Grant No. SKLSP201813), and the Shaanxi Provincial Science Fund for Distinguished Young Scholars, China (Grant No. 2018JC-027).
Corresponding Authors:  Can Guo     E-mail:

Cite this article: 

Ying-Yuan Deng(邓英远), Can Guo(郭灿), Jin-Cheng Wang(王锦程), Qian Liu(刘倩), Yu-Ping Zhao(赵玉平), and Qing Yang(杨卿) Phase-field study of spinodal decomposition under effect of grain boundary 2021 Chin. Phys. B 30 088101

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