Microscopic Phase-Field Simulation of the Order-Disorder Transition of Antiphase Domian Boundary Formed between DO₂₂ Phases

Abstract:

The order-disorder transition at antiphase domain boundary (APDB) between DO22 (Ni3V) phases is investigated using the microscopic phase-field model. After the formation of ordered APDB, the order-disorder transition at APDB is happened, and the ordered APDB transforms into a thin disordered phase layer. Accompanied with the enrichment of Ni and Al at the disordered APDB, the second phase L12 nucleates at the order-disorder interface between DO22 phases and grows along the disordered phase layer. The order-disorder transition at the ordered APDB makes the nucleation and growth of the second phase L12 much easier and faster. The disordered phase caused by the order-disorder transition at the APDB can be considered as the transient phase during the precipitation process of L12 phase.

• Periodical: Applied Mechanics and Materials (Volumes 44-47)
• Pages: 3736-3740
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.44-47.3736
• Online since: December 2010
• Authors: Ming Yi Zhang, Kun Yang, Zheng Chen
• Keywords: Antiphase Domain Boundary, DO₂₂(Ni₃V) Phase, Microscopic Phase-Field, Order-Disorder Transition, Transient Phase

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