Journal ArticleDOI
Grain boundary segregation, solute drag and abnormal grain growth
Seong Gyoon Kim,Yong Bum Park +1 more
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TLDR
In this paper, the grain boundary kinetics in terms of GB segregation of solute atoms for an isolated grain embedded in a matrix were simulated by employing a phase-field model.About:
This article is published in Acta Materialia.The article was published on 2008-09-01. It has received 178 citations till now. The article focuses on the topics: Abnormal grain growth & Grain boundary strengthening.read more
Citations
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Phase field modeling of defects and deformation
Yunzhi Wang,Ju Li +1 more
TL;DR: In this paper, the authors reviewed new perspectives on the phase field approach in modeling deformation and fracture at the fundamental defect level, including the ability to predict fundamental properties of individual defects such as size, formation energy, saddle point configuration and activation energy of defect nuclei, and the micromechanisms of their mutual interactions.
Journal ArticleDOI
Role of Solute in the Texture Modification During Hot Deformation of Mg-Rare Earth Alloys
Jason P. Hadorn,Kerstin Hantzsche,Sangbong Yi,Jan Bohlen,Dietmar Letzig,James A. Wollmershauser,Sean R. Agnew +6 more
TL;DR: In this paper, the texture weakening effect of hot-rolled Mg-Y alloys was explored using electron backscattered diffraction (EBSD) analysis of intragranular misorientation axes (IGMA) indicate that the geometrically necessary dislocation (GND) content in dilute, hotrolled alloys contain primarily basal dislocations.
Journal ArticleDOI
Current understanding and future research directions at the onset of the next century of sintering science and technology
TL;DR: Sintering and accompanying microstructural evolution is inarguably the most important step in the processing of ceramics and hard metals as mentioned in this paper, where an ensemble of particles is converted into a coherent object of controlled density and microstructure at an elevated temperature (but below the melting point) due to the thermodynamic tendency of the particle system to decrease its total surface and interfacial energy.
Journal ArticleDOI
Reconciling grain growth and shear-coupled grain boundary migration.
TL;DR: The authors present a model that connects grain growth directly to the disconnection mechanism of grain boundary migration and can account for the many deviations observed experimentally.
Journal ArticleDOI
Thermal stability of nanocrystalline materials: thermodynamics and kinetics
TL;DR: In this article, the progress in the investigation of the thermal stability of nanocrystalline (NC) materials with emphasis on the fundamentals of grain size stabilization by different approaches is reviewed.
References
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Book
Recrystallization and Related Annealing Phenomena
F.J. Humphreys,M. Hatherly +1 more
TL;DR: In this paper, the authors discuss the extent to which we are able to formulate quantitative, physically-based models which can be applied to metal-forming processes, and the subjects treated in this book are all active research areas and form a major part of at least four regular international conference series.
Journal ArticleDOI
On the theory of normal and abnormal grain growth
TL;DR: In this article, a growth equation for individual grains in single-phase materials is suggested, which is used to calculate a rate equation for normal grain growth and the size distribution in the material.
Book
Interfaces in Crystalline Materials
TL;DR: The geometry of interfaces Dislocation for interfaces Models of interatomic forces at interfaces Models and experimental observations of structure Thermodynamics of interfaces Interface phases and phase transitions Segregation of solute atoms to interfaces Diffusion at interfaces Conservative motion of interfaces: interfaces as sources/sinks for diffusional fluxes.
Journal ArticleDOI
The Impurity‐Drag Effect in Grain Boundary Motion
TL;DR: In this paper, the drag on a grain boundary produced by an impurity atmosphere is examined in detail, and is found to depend on the velocity of the grain boundary relative to the diffusivity of the impurity and its interaction with the grain boundaries.
Journal ArticleDOI
Phase-field model for isothermal phase transitions in binary alloys
TL;DR: A phase-field model to describe isothermal phase transitions between ideal binary-alloy liquid and solid phases is presented, and an asymptotic analysis as the gradient energy coefficient of the phase field becomes small shows that the model recovers classical sharp-interface models of alloy solidification when the interfacial layers are thin.