Results 241 to 250 of about 240,120 (294)
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Coupling Microstructure Characterization with Microstructure Evolution
2010Microstructure reconstruction in 3D and quantitative digital representation are enabling consideration of polycrystalline and multi-phase microstructures in mechanics codes in a realistic way. To take full advantage of these advances, we discuss in this chapter the synergy of coupling quantitative microstructure characterization by experimental imaging
Chen Shen +4 more
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Microscale Simulation of Martensitic Microstructure Evolution
Physical Review Letters, 2004A new model for the evolution of multivariant martensitic microstructure in single crystals and polycrystals is developed. In contrast with Landau-Ginzburg models, which are limited in practice to nanoscale specimens, this new scale-free model is valid for length scales greater than 100 nm and without an upper bound.
Valery I, Levitas +2 more
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Microstructure evolution in density relaxation by tapping
Physical Review E, 2010The density relaxation phenomenon is modeled using both Monte Carlo and discrete element simulations to investigate the effects of regular taps applied to a vessel having a planar floor filled with monodisperse spheres. Results suggest the existence of a critical tap intensity which produces a maximum bulk solids fraction.
Anthony D, Rosato +4 more
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“Evolution” of microstructure in materials
International Journal of Materials Research, 2008Abstract The term “evolution” is used in both biology and materials science. There are however large differences in what is meant by it. It will be shown that one difference is the probability of single or multi step nucleation. Biological structures are too complex to be recreatable by nucleation.
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Evolution of Microstructure: an Example
2001We consider a continuum model for the flow of two phases of different mobility and density in a Hele-Shaw cell or a porous medium. As a consequence of the Saffman-Taylor instability, the phase distribution is thought to develop a microstructure, so that its evolution is effectively unpredictable.
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Microstructural Evolution in Inhomogeneous Elastic Media
Journal of Computational Physics, 1997A numerical method based on boundary integrals is developed to study the diffusional evolution of microstructures produced by solid state diffusional transformations in elastically stressed binary alloys in two dimensions. The precipitate and matrix phases are isotropic and linearly elastic.
Jou, H.-J., Leo, P. H., Lowengrub, J. S.
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Microstructural evolution of buffers
Engineering Geology, 1999A buffer consisting of blocks of compacted Na bentonite powder absorbs water by which the grains expand and exfoliate, yielding clay gels that occupy the voids between them. The expandability of the grains and thereby the bulk density and hydraulic conductivity depend on the density of the gel fillings and hence on the grain density.
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Evolution of microstructures in materials induced by electropulsing
Micron, 2003Nanostructures were formed in several conventional materials under single electropulsing, that is nanophases of alpha-Cu(Zn) and beta'-(CuZn) in a cold-worked alpha-Cu(Zn) alloy, nanosized gamma-Fe in a low-carbon steel, nanosized alpha-Al in a superduralumin, and orientated nanosized TiC in a TiC/NiCr cermet.
W, Zhang, M L, Sui, Y Z, Zhou, D X, Li
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Bridging Simulations and Experiments in Microstructure Evolution
Physical Review Letters, 2003We demonstrate the importance of anisotropic interface properties in microstructure evolution by comparing computed evolved microstructures to final experimental microstructures of 5170 grains in 19 thin aluminum foil samples. This is the first time that a direct experimental validation of simulation has been performed at the level of individual grains.
M C, Demirel +3 more
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Generation and evolution of inelastic microstructures ‐ an overview
GAMM-Mitteilungen, 2012AbstractIn this paper we give an overview on the modeling of inelastic microstructures using variational methods. We start by discussing the underlying variational principles for inelastic materials, derive evolution equations for internal variables, and introduce the concept of condensed energy. As a mathematical prerequisite we review the variational
Hackl, Klaus +2 more
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