Department Faculty |
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Yunzhi WangProfessor
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Professor Wang received his
M.S. (1992) and Ph.D. (1995) in Materials Science and Engineering from ·
Energetics
and kinetics of elementary defects and defect processes ·
Microstructure
development during structural phase transformations and
microstructure–dislocation interactions during exposure to temperature
and stress in advanced structural materials including high-temperature
Ni-base superalloys, light alloys, shape memory alloys and high strength
steels. ·
Interdiffusion
microstructure and diffusion path in multi-component and multiphase coatings
and multi-layers ·
Grain
growth and texture development in multiphase and polycrystalline materials
and migration of interfaces and dislocations with segregating impurities and
precipitates ·
Phase
separation and pattern formation in fluids with coupled diffusion and flow
processes. Prof. Wang’s research
is part of a greater effort in developing microstructure- and
micromechanism-based modeling tools by integrating advanced materials
characterization and computer simulation at the Centre for Accelerated
Maturation of Materials (CAMM) at OSU. Research Project Highlights ·
Integration of phase field method with ab inito calculations of
generalized stacking fault (GSF) energy and multi-plane GSF (MGSF). This work
has led to the development of the microscopic phase field model (MPF) of
nano-mechanics, which has opened a new avenue for the study of elementary
defects and defect processes such as core energy, structure and Peierls
stress of dislocations and transformation dislocations, and
slip transmission of dislocations across interphase interfaces. ·
Application of transition pathway search algorithms such as the nudged
elastic band ( ·
Application of phase field method
at mesoscale to examine the collective behaviour of mutually interacting
defects of arbitrary configurations in both elastically anisotropic and
inhomogeneous systems. ·
Integration of phase field method with CALPHAD thermodynamic and
mobility databases, which has allowed for the development of phase field
methods into engineering design tools (including fast-acting-models) for
practical industrial applications. ·
Development and application of phase field models for interdiffusion
microstructure in high-temperature coatings and oxidation resistant alloys. ·
Development and applications of phase field models for texture
development and grain growth in polycrystalline materials. ·
Theory and simulation of impurity segregation and transition at grain
boundaries and dislocations. The work for the first time formulated a
complete continuum segregation model based on gradient thermodynamics and
contrasted the model to preexisting continuum and discrete models. ·
Coupling hydrodynamic motion and atomic diffusion to study phase
separation and patter formation in liquid and polymer systems. |
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