Computer Investigations on Phase Decomposition in Real Alloy Systems Based on a Discrete Type Phase Field Method

1997 ◽  
Vol 481 ◽  
Author(s):  
Toni Miyazaki ◽  
Toshiyuki Koyama ◽  
Takao Kozakai
Keyword(s):  
Phase Field ◽  
Alloy System ◽  
Field Method ◽  
Phase Field Method ◽  
Phase Decomposition ◽  
Microstructure Formation ◽  
Interchange Energy ◽  
Discrete Phase ◽  
The Difference ◽  
Difference Expression

ABSTRACTOn the basis of the discrete phase field method where the difference expression of non-linear kinetic equation, the composition dependencies of the atomic interchange energy and the inhomogeneous elasticity are taken into consideration so as to be applicable for the real alloy system. The phase decomposition and the microstructure formation are computer simulated for the Fe-Al- Co ternary ordering alloy by utilizing the thermodynamic data.

scholarly journals 112 Prediction of Pearlite Microstructure Formation by Multi-Phase-Field Method

2008 ◽  
Vol 2008.21 (0) ◽  
pp. 119-120
Author(s):  
Takashi YAMAMOTO ◽  
Akinori YAMANAKA ◽  
Tomohiro TAKAKI ◽  
Yoshihiro TOMITA
Keyword(s):  
Phase Field ◽  
Field Method ◽  
Phase Field Method ◽  
Microstructure Formation ◽  
Multi Phase

Phase-Field Modeling of the Microstructure Evolutions in Fe-Cu Base Alloys

2007 ◽  
Vol 539-543 ◽  
pp. 2383-2388 ◽  
Author(s):  
Toshiyuki Koyama ◽  
Hidehiro Onodera
Keyword(s):  
Phase Field ◽  
Structural Phase ◽  
Alloy System ◽  
Phase Field Method ◽  
Phase Decomposition ◽  
Phase Field Modeling ◽  
Rich Phase ◽  
Microstructure Changes ◽  
Field Modeling ◽  
Bcc Phase

The phase transformations and the microstructure developments in Fe-Cu base alloys during isothermal aging are simulated based on the phase-field method. Since the chemical free energy used in this simulation is obtained from the thermodynamic database of phase diagrams, the calculated microstructure changes are directly related to the phase diagram of the real alloy system. Firstly the phase decomposition and the microstructure changes in the Fe-Cu binary alloy system are demonstrated as the simple example of the phase-field modeling, i.e., the phase decomposition in bcc phase where the Cu-rich phase forms, the structural phase transformation from bcc to fcc phase in the Cu-rich nano-particle, and the shape change of fcc-Cu precipitates from sphere to rod. Secondly, the phase decomposition in bcc phase of the multi-component alloys such as the Fe-Cu-X (X=Mn,Ni) ternary system and the Fe-Cu-Mn-Ni quaternary alloy is simulated. At the early stage of aging, the Cu-rich zone with bcc structure begins to nucleate, and the component X (=Mn, Ni) is partitioned to the Cu-rich phase. When the Cu composition in the precipitate reaches equilibrium, the component X inside the precipitates moves toward to the interface region between the precipitate and matrix. Finally, there appears the shell structure that the Cu precipitates surrounded by the thin layer with high concentration of component X.

scholarly journals Application of Phase-Field Method to the Analysis of Phase Decomposition of Alloys

10.5772/64153 ◽  
2016 ◽  
Author(s):  
Erika O. Avila-Davila ◽  
Victor M. Lopez-Hirata ◽  
Maribel L. Saucedo-Muñoz
Keyword(s):  
Phase Field ◽  
Field Method ◽  
Phase Field Method ◽  
Phase Decomposition
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