A5040387494- Shape Memory Alloy Transformations
- Magnetic Properties and Applications
- Magnetic properties of thin films
- Microstructure and Mechanical Properties of Steels
- Solidification and crystal growth phenomena
- Aluminum Alloy Microstructure Properties
- Microstructure and mechanical properties
- Ferroelectric and Piezoelectric Materials
- Magnetic Properties of Alloys
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Numerical methods in engineering
- Metallurgy and Material Forming
- Composite Material Mechanics
- Intermetallics and Advanced Alloy Properties
- X-ray Diffraction in Crystallography
- Advanced Mathematical Modeling in Engineering
- Metallic Glasses and Amorphous Alloys
- High-pressure geophysics and materials
- Semiconductor materials and interfaces
- Rare-earth and actinide compounds
- High Temperature Alloys and Creep
- Acoustic Wave Resonator Technologies
- Advanced Electron Microscopy Techniques and Applications
- Characterization and Applications of Magnetic Nanoparticles
Michigan Technological University
2016-2025
West China Hospital of Sichuan University
2024
Sichuan University
2024
Soochow University
2024
Shanghai University of Traditional Chinese Medicine
2021
University of Virginia
2018
Centre de Mise en Forme des Matériaux
2015
Centre National de la Recherche Scientifique
2014-2015
ParisTech
2015
University of Oslo
2007-2015
A theory is developed for intermediate monoclinic (FE(m)) phases near morphotropic phase boundaries in ferroelectrics of complex oxides. It based on the conformal miniaturization stress-accommodating tetragonal domains under condition low domain-wall energy density. The microdomain-averaged lattice parameters are determined and attributed to an adaptive phase. applied temperature, electric field, compositional dependent FE(m) parameters. predictions rigidly obeyed over entire stability range.
Ferroelectric and ferroelastic phases with very low domain wall energies have been shown to form miniaturized microdomain structures. A theory of an adaptive ferroelectric phase has developed predict the microdomain-averaged crystal lattice parameters this structurally inhomogeneous state. The is extension conventional martensite theory, applied systems energies. case microdomains tetragonal symmetry considered. It for such a that nanoscale coherent mixture can be interpreted as phase, whose...
The phase field microelasticity theory of a three-dimensional elastically anisotropic solid arbitrarily inhomogeneous modulus also containing arbitrary structural inhomogeneities is proposed. based on the equation for strain energy and structurally system presented as functional field, which effective stress-free “equivalent” homogeneous system. It proved that minimizing this fully determines exact elastic equilibrium in solid. minimizer obtained steady state solution time-dependent...
The phase field theory and model of a multidislocation dynamics in an elastically anisotropic crystal under applied stress is developed. proposed three-dimensional (3D) particular case our microelasticity the stress-induced martensitic transformations. A spontaneous self-organization dislocations evolving ensemble, which involves multiplication/annihilation movement controlled by their elastic interaction, described Ginzburg–Landau kinetic equation. Examples 3D computer simulation...
The phase field microelasticity theory of a three-dimensional elastically anisotropic single crystal with multiple voids and cracks is developed. It extended to the case isotropic polycrystal. based on exact equation for strain energy “equivalent” continuous homogeneous body presented as functional field. This equivalent stress-free strain. proved that minimizing fully determines elastic displacement voids/cracks. geometry evolution are described by field, which solution stochastic...
It is proved that the stress-free strain distribution minimizing energy of homogeneous modulus body fully determines elasticity discontinuous body. This result used as a basis for proposed three-dimensional phase field microelasticity theory and model with cracks voids in elastically anisotropic crystal under applied stress. The elastic equilibrium spontaneous evolution these defects are described by Ginzburg–Landau kinetic equation. Examples computations evolutions systems and/or considered.
The atomic density function kinetic theory of a spontaneous rearrangement at the scale is developed. In this theory, evolution system described not by individual movement each atom in same but functions, which are averages over time-dependent ensemble. temporal densities driven free energy relaxation. thermodynamic aspects instability homogeneous liquid state and formation crystalline amorphous discussed. Examples self-assembling atoms three-dimensional nanocrystal, two-dimensional...
A series of mutations in the homeo domain yeast alpha 2 protein were constructed to test, both vivo and vitro, predictions based on 2-DNA cocrystal structure described by Wolberger et al. (1991). The effects observed three different contexts using authentic target DNA sequences: binding alone specific DNA, cooperatively with MCM1 a1 DNA. As expected, changes amino acid residues that contact X-ray severely compromised ability bind MCM1. In contrast, many these same mutations, including a...