Modeling discontinuous dynamic recrystallization containing second phase particles in magnesium alloys utilizing phase field method

2021 ◽  
Vol 200 ◽  
pp. 110858
Author(s):  
N.Y. Zhu ◽  
C.Y. Sun ◽  
Y.L. Li ◽  
L.Y. Qian ◽  
S.Y. Hu ◽  
...  
Keyword(s):  
Dynamic Recrystallization ◽  
Magnesium Alloys ◽  
Phase Field ◽  
Field Method ◽  
Phase Field Method ◽  
Second Phase ◽  
Second Phase Particles

Phase Field Model for Influence of Edge Dislocation on Precipitation

2011 ◽  
Vol 415-417 ◽  
pp. 1482-1485
Author(s):  
Chuang Gao Huang ◽  
Ying Jun Gao ◽  
Li Lin Huang ◽  
Jun Long Tian
Keyword(s):  
Edge Dislocation ◽  
Phase Field ◽  
Field Model ◽  
Phase Field Model ◽  
Field Method ◽  
Phase Field Method ◽  
Second Phase ◽  
Free Energy Function ◽  
Phase Nucleation ◽  
Good Agreement

The second phase nucleation and precipitation around the edge dislocation are studied using phase-field method. A new free energy function is established. The simulation results are in good agreement with that of theory of dislocation and theory of non-uniform nucleation.

Phase Field Simulation of Precipitation on Edge Dislocation

2013 ◽  
Vol 785-786 ◽  
pp. 1278-1281
Author(s):  
Ying Jun Gao ◽  
Tian Xia Zhu ◽  
Wen Quan Zhou ◽  
Chuang Gao Huang
Keyword(s):  
Edge Dislocation ◽  
Phase Field ◽  
Elastic Strain Energy ◽  
Field Method ◽  
Phase Field Method ◽  
Second Phase ◽  
Free Energy Function ◽  
Dislocation Interaction ◽  
Phase Nucleation ◽  
Good Agreement

The second phase nucleation and precipitation around an edge dislocation are studied using phase field method. A new free energy function including the elastic strain energy is established to describe the dislocation interaction with the solute. The results give the distribution of strain field of dislocation and show the precipitates grow up according to the power growth law with the index 2. The simulated results are in good agreement with that of theory of non-uniform nucleation.

scholarly journals Dynamic recrystallization analysis of reduction pretreatment process by multi-phase field method

2020 ◽  
Vol 7 (10) ◽  
pp. 106501
Author(s):  
Hongqiang Liu ◽  
Zhen Ning ◽  
Wei Yu ◽  
Zhicheng Cheng ◽  
Xindong Wang ◽  
...  
Keyword(s):  
Dynamic Recrystallization ◽  
Phase Field ◽  
Field Method ◽  
Phase Field Method ◽  
Multi Phase

Recrystallization Behaviour of Two Magnesium Alloys

2004 ◽  
Vol 467-470 ◽  
pp. 477-482 ◽  
Author(s):  
L.W.F. Mackenzie ◽  
Gordon W. Lorimer ◽  
John F. Humphreys ◽  
T. Wilks
Keyword(s):  
Dynamic Recrystallization ◽  
Grain Boundaries ◽  
Optical Microscopy ◽  
Magnesium Alloys ◽  
Particle Distribution ◽  
Experimental Alloy ◽  
Second Phase ◽  
Electron Backscattered Diffraction ◽  
Second Phase Particles

The deformation and recrystallization behaviour of two magnesium alloys, WE43 and an experimental “Alloy A1” containing a large amount of second phase, have been investigated. Optical microscopy and electron backscattered diffraction (EBSD) were used to observe each alloy after deformation in a channel die at 553 and 558 K and subsequent recrystallization during annealing at 673 K. Alloy A1 dynamically recrystallised during deformation at 553 and 558 K. In WE43 the particle distribution affected the onset of dynamic recrystallization. Both alloys exhibited evidence of particle stimulated nucleation (PSN) of recrystallization at second phase particles as well as recrystallization at pre-existing grain boundaries. The A1 and WE43 alloys were extruded at temperatures of 573 K and 633 and 663 K, respectively. The extruded microstructures were compared to those that developed during channel die deformation.

Phase Field Model for Grain Growth with Second-Phase Particles of Stick Shape

2013 ◽  
Vol 741 ◽  
pp. 3-6 ◽  
Author(s):  
Wen Quan Zhou ◽  
Ying Juna Gao ◽  
Yao Liu ◽  
Zhi Rong Luo ◽  
Chuang Gao Huang
Keyword(s):  
Grain Boundary ◽  
Grain Growth ◽  
Phase Field ◽  
Influence Factor ◽  
Phase Field Model ◽  
Phase Field Method ◽  
Second Phase ◽  
Triple Junctions ◽  
Pinning Effect ◽  
Second Phase Particles

The phase field method was applied to study the effect of second-phase particles (SPP) with different geometric orientations and shapes on grain growth. The results show that, in the grain growth process, most of the spherical second-phase particles located at triple junctions, while the stick SPPs located at the grain boundaries along the grain boundary. The second-phase particles are of the strong pinning effect on grain boundary and the limiting grain radius can be expressed by Zener relations. In the condition of the second-phase particles area fraction and size remaining the same, the stick SPPs are of more effective pinning on grain growth than that for spherical SPPs, and the orientation of disk second-phase particles is also an influence factor for pinning effect. Stick second-phase particles with multiple orientations can make a better pining effect than those with only one orientation.

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