Results 231 to 240 of about 12,033 (260)

On the interaction between radiation damage and coherent precipitates

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1971
Abstract The experiments of Brown, Woolhouse & Valdrè (1968) on coherency loss induced by fast neutron irradiation have been extended by varying the precipitate size distribution, the fast neutron dose and the mismatch of the precipitate. When the integrated dose and the mean precipitate size are large, coherency loss is extensive
G. R. Woolhouse, M Ipohorski
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On the coherency-controlled growth habit of precipitates in minerals

Journal of Applied Crystallography, 2010
Minimization of interfacial energy is the dominant factor governing the equilibrium habit,i.e.orientation and morphology, of a precipitate in the parent crystal. Existing models of optimum interphase boundaries have established criteria that minimize the lattice misfit and/or the strain energy by the comparison of the interplanar spacings of the two ...
Shyh-Lung Hwang, Pouyan Shen, Tzen-Fu Yui, Hao-Tsu Chu   +3 more
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Growth of a coherent precipitate from a supersaturated solution

Journal of Materials Research, 1988
A treatment of diffusion limited growth of a coherent spherical precipitate into supersaturated solution is presented. It is found that the growth kinetics are affected by dilatational coherency strains and by compositionally induced strains in the matrix phase.
V. J. Laraia, William C. Johnson, P. W. Voorhees   +2 more
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On calculations of the crss of alloys containing coherent precipitates

Acta Metallurgica, 1968
Abstract Two recent estimates on the critical resolved shear stress of alloys containing coherent precipitates are critically compared. The differences between both estimates are discussed in detail. In both cases the interaction between dislocation and precipitates is assumed to occur via the elastic strain field surrounding the coherent particles ...
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Equilibrium shapes of coherent precipitates near a surface

Mechanics of Materials, 2018
The shape stability of a two-dimensional precipitate embedded in a matrix has been theoretically investigated when it is strained due to an anisotropic lattice mismatch between the matrix and the precipitate. In the case of a semi-infinite matrix, the precipitate is found to align perpendicularly to the free-surface direction when both lattice ...
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Coherent equilibrium in alloys containing spherical precipitates

Acta Metallurgica et Materialia, 1995
Abstract Coherent equilibrium is investigated theoretically in alloys containing monodispersed spherical precipitates. The alloy system is subjected to a Dirichlet tessellation by constructing a Voronoi polyhedron around each particle, and for the purpose of calculation each polyhedron is approximated as a sphere. The basic unit of the microstructure
A.J. Ardell, A. Maheshwari
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Coherent precipitation of M2C carbides in AF1410 steel

Materials Science and Engineering: A, 1989
Abstract The effect of elastic coherency on the composition and stoichiometry of M 2 C carbide precipitates ( M ≡ Cr , Mo , Fe ) in AF1410 steel is analyzed utilizing thermodynamic conditions for mechanical, chemical and interfacial equilibrium between the ferrite (tempered martensite) and the M 2 C phase.
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Spatial Coherence of Monthly Precipitation in the United States

Monthly Weather Review, 1982
Abstract Factor analysis and an orthogonal rotation to the varimax criterion are used to identify the synoptic-scale regions of the United States over which monthly precipitation amounts show the greatest spatial coherence. The regions are consistent with previously documented cyclone trajectories.
John E. Walsh, Michael B. Richman, David W. Allen   +2 more
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Coherent Precipitation near Dislocations. A Theoretical Analysis

Physica Status Solidi (a), 1979
A simple theoretical model is developed for a dislocation decorated by a cylindrical precipitate, which makes it possible to derive the energy change ΔW associated with the precipitation process versus radius R of the precipitate. The distance a between the cylinder axis and the dislocation line is taken so as to minimize ΔW.
F. Montheillet, J. M. Haudin
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Semi-coherent precipitation of silicon nitride in silicon

Proceedings, annual meeting, Electron Microscopy Society of America, 1988
Implantation of nitrogen into silicon, followed by high-temperature annealing causes formation of silicon nitride. At high doses, continuous polycrystalline layers are formed, while at lower doses, discrete precipitates are formed. These precipitates show preferred orientation with the silicon matrix. This paper presents the results of characterization
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