Thermodynamics and kinetics of phase transformation in rare earth–magnesium alloys: A critical review

2020 ◽  
Vol 44 ◽  
pp. 171-190 ◽  
Author(s):  
Qun Luo ◽  
Yanlin Guo ◽  
Bin Liu ◽  
Yujun Feng ◽  
Jieyu Zhang ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Rare Earth ◽  
Magnesium Alloys ◽  
Critical Review ◽  
Thermodynamics And Kinetics ◽  
Kinetics Of

Mesoscopic Simulation of the Ferrite Nucleation on Austenitic Grain Boundary for Nanograined Steel

2015 ◽  
Vol 817 ◽  
pp. 731-735
Author(s):  
Peng Yu ◽  
Lin Zhang ◽  
Lin Xiu Du ◽  
Jun Hu
Keyword(s):  
Grain Size ◽  
Phase Transformation ◽  
Nucleation Process ◽  
Austenite Grain Size ◽  
Mesoscopic Simulation ◽  
Thermodynamics And Kinetics ◽  
Austenite Grain ◽  
Austenite Grains ◽  
Ferrite Nucleation ◽  
Kinetics Of

We use the cellular automaton (CA) modeling to investigate the ferrite nucleation on the austenite grains. On the basis of the thermodynamics and kinetics of phase transformation from austenite to ferrite, the CA modeling demonstrates that the size of nucleated ferrite grains is increased with increasing of cooling rates, and nucleation process is finished instantly at a given cooling rate. The initial austenite grain size plays an important role in the obtained ferrite nucleation number, and the potential nucleation cells are increased.

scholarly journals Towards efficient oxygen separation from air: Influence of the mean rare-earth radius on thermodynamics and kinetics of reactivity with oxygen in hexagonal Y1-xRxMnO3+δ

2021 ◽  
Vol 205 ◽  
pp. 116544
Author(s):  
Kacper Cichy ◽  
Konrad Świerczek ◽  
Katarzyna Jarosz ◽  
Alicja Klimkowicz ◽  
Mateusz Marzec ◽  
...  
Keyword(s):  
Rare Earth ◽  
Oxygen Separation ◽  
Earth Radius ◽  
Thermodynamics And Kinetics ◽  
The Mean ◽  
Kinetics Of

Benefits of Modeling of Melting for the Understanding of Solidification Processes

2010 ◽  
Vol 649 ◽  
pp. 53-59
Author(s):  
Markus Rettenmayr
Keyword(s):  
Free Energy ◽  
Phase Transformation ◽  
Diffusion Coefficients ◽  
Solid Phase ◽  
Local Equilibrium ◽  
Kinetic Equations ◽  
Thermodynamics And Kinetics ◽  
Solidification Processes ◽  
Kinetics Of ◽  
Melting And Solidification

Melting and solidification are both phase transformations involving a liquid and a solid phase. In a simplifying procedure melting could be treated as the inverse process of solidification. However, there are substantial differences in the thermodynamics and kinetics of melting and solidification. The elaboration of a model for melting of binary alloys has lead to the possibility to also describe solidification processes more consistently. Input parameters in the model are the Gibbs Free Energy curves and the diffusion coefficients in the liquid and solid phase, respectively. Assumptions about the thermodynamic state of the interface like local equilibrium are not necessary, recently developed interface thermodynamics is coupled with the kinetic equations. Simulations results for steady-state melting and solidification are compared. The treatment of both solidification and melting yields some insight in the proper¬ties of the liquid/solid interface and its role during the phase transformation.

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