Results 221 to 230 of about 48,006 (268)
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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 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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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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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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Microstructural Evolution in Nanocrystalline Ni Coatings
Journal of Materials Research, 2002Gas-atomized Ni powders were mechanically milled under liquid nitrogen and subsequently sprayed using a high-velocity oxygen-fuel thermal spraying system. The resultant coatings were evaluated using various analytical methods, including scanning electron microscopy (SEM), transmission electron microscopy, and atom probe field ion microscopy (APFIM ...
Lau, M. +6 more
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The evolution of dinosaur tooth enamel microstructure
Biological Reviews, 2010The evolution of tooth enamel microstructure in both extinct and extant mammalian groups has been extensively documented, but is poorly known in reptiles, including dinosaurs. Previous intensive sampling of dinosaur tooth enamel microstructure revealed that: (1) the three-dimensional arrangement of enamel types and features within a tooth-the ...
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Examples of evolution of microstructure in ceramics and composites
Microscopy Research and Technique, 1993AbstractIn this article we describe a number of studies involving the direct observation of microstructural evolution. In general these investigations were carried out to establish the mechanistic paths involved. The materials studied range from fibers being evaluated for use in high‐temperature ceramic composites to energetic materials used as ...
P W, Brown +2 more
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Microstructures and organizational patterns in the evolution of firms
Behavioral Science, 1992The development of two Hayekian concepts as heuristic principles is presented as an exploration of relations between technological processes and firms' organizational systems. This is done by analyzing, within the decisional processes of the economic unit, the forms of technical-organizational configuration that firms must have in order to produce ...
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Multiscale Modeling of Precipitate Microstructure Evolution
Physical Review Letters, 2002We demonstrate how three "state-of-the-art" techniques may be combined to build a bridge between atomistics and microstructure: (1) first-principles calculations, (2) a mixed-space cluster expansion approach, and (3) the diffuse-interface phase-field model. The first two methods are used to construct the driving forces for a phase-field microstructural
V, Vaithyanathan +2 more
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