The annihilation kinetics of the nanoscale antiphase domain boundary in B2 alloys: phase field characterization at the atomistic level

2019 ◽  
Vol 54 (23) ◽  
pp. 14440-14455 ◽  
Author(s):  
Kun Wang ◽  
Shi Hu ◽  
Yongxin Wang
Keyword(s):  
Phase Field ◽  
Domain Boundary ◽  
Antiphase Domain ◽  
Kinetics Of

Microscopic Phase Field Study on the Kinetics of Order-Disorder Transition of APDBs Formed between DO22 Phases during Stress Aging

2014 ◽  
Vol 789 ◽  
pp. 530-535 ◽  
Author(s):  
Ming Yi Zhang ◽  
Guang Quan Yue ◽  
Jia Zhen Zhang ◽  
Kun Yang ◽  
Zheng Chen
Keyword(s):  
Phase Field ◽  
Field Model ◽  
Domain Boundary ◽  
Phase Field Model ◽  
Antiphase Domain ◽  
Phase Layer ◽  
Disorder Transition ◽  
Disordered Phase ◽  
Kinetics Of ◽  
Microscopic Phase Field Model

Kinetics of order-disorder transition at antiphase domain boundary (APDB) formed between DO22 (Ni3V) phases during stress aging was investigated using microscopic phase field model. The results demonstrated that whether order-disorder transition happens or not depends on the atomic structure of the APDB. Accompanied with the depletion of V and enrichment of Ni and Al, order-disorder transition happened at the APDB (001)//(002). Whereas at the APDB {100}·1⁄2[100], which remains ordered with temporal evolution, Ni and Al enrich and V depletes. Composition evolution of APDB with order-disorder transition favors the nucleation of the L12 and disordered phase. Some of the grains grew bigger while the others disappeared, accompanying the formation of disordered phase layer during order-disorder transition of APDBs, and the order-disorder transition of APDBs can be considered as accompanying process of coarsening of ordered domain phases and growth of disordered phases.

Kinetics of Order-Disorder Transition of Antiphase Domain Boundary Formed between DO22 Phases: Microscopic Phase-Field Study

2010 ◽  
Vol 160-162 ◽  
pp. 996-1000
Author(s):  
Ming Yi Zhang ◽  
Kun Yang ◽  
Zheng Chen
Keyword(s):  
Phase Field ◽  
Domain Boundary ◽  
Phase Field Model ◽  
Antiphase Domain ◽  
Precipitation Process ◽  
Second Phase ◽  
Phase Layer ◽  
Disorder Transition ◽  
Disordered Phase ◽  
Kinetics Of

Based on the microscopic phase-field model, the precipitation process of Ni75Al4.3V20.7 alloy at 1190K is simulated, and the kinetics of order-disorder transition at antiphase domain boundary (APDB) formed between DO22 (Ni3V) phases is investigated. After the ordered APDB formed by the impingement of growing DO22 (Ni3V) domains, the order-disorder transition at APDB is happened. Accompanied with the enrichment of Ni and Al at the APDB, the ordered APDB transforms into a thin disordered phase layer. The second phase L12 nucleates at the order-disorder interface between DO22 and disordered phases, and grows along the disorder phase layer quickly. The order-disorder transition at the ordered APDB accelerates the nucleation and growth of L12 phase at the APDB. The disordered phase caused by the order-disordered transition can be considered the transient phase during the precipitation process of L12 phase.

Microscopic phase-field study on order-disorder transition of the antiphase domain boundary formed between L12 phases

2011 ◽  
Vol 54 (12) ◽  
pp. 3409-3414 ◽  
Author(s):  
MingYi Zhang ◽  
Kun Yang ◽  
Zhen Chen ◽  
YongXin Wang ◽  
XiaoLi Fan
Keyword(s):  
Field Study ◽  
Phase Field ◽  
Domain Boundary ◽  
Antiphase Domain ◽  
Disorder Transition

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

2010 ◽  
Vol 44-47 ◽  
pp. 3736-3740
Author(s):  
Ming Yi Zhang ◽  
Kun Yang ◽  
Zheng Chen
Keyword(s):  
Phase Field ◽  
Domain Boundary ◽  
Phase Field Model ◽  
Antiphase Domain ◽  
Precipitation Process ◽  
Second Phase ◽  
Phase Layer ◽  
Disorder Transition ◽  
Disordered Phase ◽  
Microscopic Phase Field Model

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.

scholarly journals Growth kinetics of antiphase domain in Ti3Al intermetallic compound

2004 ◽  
Vol 5 (1-2) ◽  
pp. 19-28 ◽  
Author(s):  
Y. Koizumi ◽  
H. Katsumura ◽  
Y. Minamino ◽  
N. Tsuji ◽  
J.G. Lee ◽  
...  
Keyword(s):  
Intermetallic Compound ◽  
Growth Kinetics ◽  
Antiphase Domain ◽  
Kinetics Of

Electron microscopy of antiphase domain boundary tubes in deformed ordered alloys

1983 ◽  
Vol 387 (1792) ◽  
pp. 91-104 ◽  
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Flow Stress ◽  
Domain Boundary ◽  
Antiphase Domain ◽  
Dark Field ◽  
Al Alloy ◽  
Ordered Alloys ◽  
Microscope Images ◽  
Dark Field Electron

Antiphase domain boundary (APB) tubes have been observed in a slightly deformed Fe–30.5 at. % Al alloy in dark field electron microscope images taken in superlattice reflexions. The image contrast theory has been developed and accounts satisfactorily for the nature of the APB tube contrast observed. The contrast theory is used to estimate the heights of the tubes. The widths of the tubes range from 20 to 50 ņ, and the measured heights are in the range of one to six times the elementary height. Evidence is presented that tubes are generated by the Vidoz & Brown (1962) mechanism and by a mechanism of cross-slip and annihilation of screw superdislocations. The possible effects of tubes on flow stress are discussed.

Sign in / Sign up

Export Citation Format

Share Document