Migration mechanisms of interphase boundaries with irrational orientation relationships in massive transformations : A phase-field crystal study

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
View graph of relations

Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)420-427
Journal / PublicationComputational Materials Science
Volume159
Online published26 Dec 2018
Publication statusPublished - Mar 2019
Externally publishedYes

Abstract

Migration mechanisms of interphase boundaries (IPBs) are essential for understanding solid phase transformations. Most studies of the migration mechanisms of IPBs are focused on transformations under rational or near-rational orientation relationships. However, for cases of irrational orientation relationships that widely exist in massive transformations and grain boundary (GB) precipitations, knowledge remains extremely lacking. In this study, taking a triangular-square massive transformation as an example, we explored the migration mechanisms of IPBs with irrational orientation relationships at atomic scales by using the phase-field crystal method. Crystallography analysis based on near-coincidence site calculations also were conducted to verify simulated IPBs structures. Both massive transformations and precipitation transformations were reproduced using the phase-field crystal model. The simulation results show that, similar to the case of rational orientation relationships, the IPBs with irrational orientation relationships migrate by a ledge mechanism due to the satisfying of the edge-to-edge matching relationship. Further simulations on the interactions between IPBs and GBs indicate that GBs can make the newly generated massive phase change its orientation during the process of massive phase transfer across some low-angle GBs.

Research Area(s)

  • Grain boundary, Interphase boundary migration, Phase-field crystal model

Citation Format(s)

Migration mechanisms of interphase boundaries with irrational orientation relationships in massive transformations : A phase-field crystal study. / Huang, Yunhao; Wang, Jincheng; Wang, Zhijun; Li, Junjie; Guo, Can.

In: Computational Materials Science, Vol. 159, 03.2019, p. 420-427.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review