Evolution of Individual Grains in 3d Microstructure Generated by Computational Simulation of Transformations Involving Two Phases

2018 ◽  
Vol 930 ◽  
pp. 305-310
Author(s):  
André Luiz Moraes Alves ◽  
Guilherme Dias da Fonseca ◽  
Marcos Felipe Braga da Costa ◽  
Weslley Luiz da Silva Assis ◽  
Paulo Rangel Rios
Keyword(s):  
Mathematical Model ◽  
Solid State ◽  
Phase Transformations ◽  
Microstructure Evolution ◽  
Initial Phase ◽  
Computational Simulation ◽  
3D Microstructure ◽  
Phase Transform ◽  
Two Phases ◽  
Individual Grains

In the phase transformations of the solid state, situations can occur in which the initial phase transform forming two or more distinct phases. The exact mathematical model for situations where more than one transformation occurs simultaneously or sequentially was proposed by Rios and Villa. The computational simulation was used to study the evolution and visualization of the possible microstructures that these transformations may present. The causal cone methodology was adopted. The simulations were compared with the analytical model to ensure that they occur as expected. The growth of individual grains of each phase was monitored in 3D microstructure evolution. With this monitoring, was possible to extract useful data able to quantify the simulated 3D microstructure. Quantifying the simulated microstructures increase the possibility of the simulations give to the experimentalist insights about the transformations. In this paper, it is verified that each grain evolves in an individual way, as expected, however their growth is similar.

Three Dimensional Prediction of Microstructure Evolution and Mechanical Properties of Hot Strips

2011 ◽  
Vol 291-294 ◽  
pp. 455-464 ◽  
Author(s):  
Guo Ming Zhu ◽  
Chao Lv ◽  
Yong Lin Kang ◽  
Guo Guang Cheng
Keyword(s):  
Microstructure Evolution ◽  
Prediction Models ◽  
Computational Simulation ◽  
Temperature Drop ◽  
Three Dimensional ◽  
Rolling Process ◽  
Real Situation ◽  
Property Prediction ◽  
C Language ◽  
3D Microstructure

With the 3D thermal mechanical coupled elastic-plastic finite element method and by simulating the whole rolling process of 1250mm×20mm C-Mn hot strips, this paper obtains the temperature field and deformation result of the rolling process. By comparing the temperature drop curve with the measured data in the field, it shows that the simulation result is close to the real situation. Based on the thermal mechanical coupled simulation of the whole rolling process, this paper completes the computational simulation of the prediction of the 3D microstructure and property of hot strips by using the relevant microstructure evolution and property prediction models and advanced C language programming, thus providing reference for the property prediction of new products and processes.

Solid-state phase transformations involving solute partitioning: modeling and measuring on the level of individual grains

2004 ◽  
Vol 52 (16) ◽  
pp. 4757-4766 ◽  
Author(s):  
S.E. Offerman ◽  
N.H. van Dijk ◽  
J. Sietsma ◽  
E.M. Lauridsen ◽  
L. Margulies ◽  
...  
Keyword(s):  
Solid State ◽  
Phase Transformations ◽  
Solute Partitioning ◽  
Individual Grains

Modeling Solid-State Phase Transformations and Microstructure Evolution

MRS Bulletin ◽  
2001 ◽  
Vol 26 (3) ◽  
pp. 197-202 ◽  
Author(s):  
L.Q. Chen ◽  
C. Wolverton ◽  
V. Vaithyanathan ◽  
Z.K. Liu
Keyword(s):  
Solid State ◽  
Phase Transformations ◽  
Microstructure Evolution

ChemInform Abstract: Modeling Solid-State Phase Transformations and Microstructure Evolution

ChemInform ◽  
2010 ◽  
Vol 32 (29) ◽  
pp. no-no
Author(s):  
L. Q. Chen ◽  
C. Wolverton ◽  
V. Vaithyanathan ◽  
Z. K. Liu
Keyword(s):  
Solid State ◽  
Phase Transformations ◽  
Microstructure Evolution

The use of high-resolution FESEM to study solid-state phase transformations and reactions

1994 ◽  
Vol 52 ◽  
pp. 1028-1029
Author(s):  
P. G. Kotula ◽  
D. D. Erickson ◽  
C. B. Carter
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Phase Transformations ◽  
High Efficiency ◽  
Sol Gel ◽  
Quantitative Information ◽  
Solid State Reactions ◽  
Critical Dimensions ◽  
Backscattered Electrons ◽  
Backscattered Electron

High-resolution field-emission-gun scanning electron microscopy (FESEM) has recently emerged as an extremely powerful method for characterizing the micro- or nanostructure of materials. The development of high efficiency backscattered-electron detectors has increased the resolution attainable with backscattered-electrons to almost that attainable with secondary-electrons. This increased resolution allows backscattered-electron imaging to be utilized to study materials once possible only by TEM. In addition to providing quantitative information, such as critical dimensions, SEM is more statistically representative. That is, the amount of material that can be sampled with SEM for a given measurement is many orders of magnitude greater than that with TEM.In the present work, a Hitachi S-900 FESEM (operating at 5kV) equipped with a high-resolution backscattered electron detector, has been used to study the α-Fe2O3 enhanced or seeded solid-state phase transformations of sol-gel alumina and solid-state reactions in the NiO/α-Al2O3 system. In both cases, a thin-film cross-section approach has been developed to facilitate the investigation. Specifically, the FESEM allows transformed- or reaction-layer thicknesses along interfaces that are millimeters in length to be measured with a resolution of better than 10nm.

Dielectric and Magnetic Properties of BaTiO3/NiFe2O4 Composites

2007 ◽  
Vol 336-338 ◽  
pp. 377-380 ◽  
Author(s):  
Jian Hong Shen ◽  
Ji Zhou ◽  
Xue Min Cui ◽  
Yue Hui Wang
Keyword(s):  
Dielectric Constant ◽  
Magnetic Properties ◽  
Solid State ◽  
Spinel Structure ◽  
Initial Permeability ◽  
Solid State Route ◽  
Permittivity And Permeability ◽  
Xrd Studies ◽  
Two Phases ◽  
Conventional Solid State Route

A series of ferrroelectric-ferromagnetic composites were synthesized from BaTiO3 and NiFe2O4 ferrite by conventional solid-state route. XRD studies indicated that the composites comprised of only two phases, BaTiO3 phase with perovskite structure and NiFe2O4 phase with spinel structure. Frequency dependence of permittivity and permeability were also measured. Experimental results showed that the dielectric constant and initial permeability of these composites could be tunable by varying the composition of composites. Thus, these composites can be used for multilayer chips EMI filters.

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