Results 261 to 270 of about 90,850 (290)

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
openaire   +1 more source

Presence of coherent precipitate in VC0.76 monocrystals

Journal of the Less Common Metals, 1973
Abstract An electron transmission microscope study in VC0.76 monocrystals has revealed the presence of a fine, coherent, ordered precipitate randomly distributed in a disordered matrix. The precipitate revealed a domain structure similar to that observed within the domains in VC0.84 monocrystals.
P.H. Thornton, R.K. Govila
openaire   +1 more source

On the Extra-Resistivity of Coherent Precipitates

Physica Status Solidi (a), 1979
By means of a formula recently developed by the authors which allows one to calculate the extra-resistivity of GP zones (Δϱex) by the help of theoretical XSAS intensities and XSAS intensity distribution functions of single spherical as well as ellipsoidal GP zones the course of Δϱex is calculated considering certain decomposition processes. For example
C. Radomsky, H. Löffler
openaire   +1 more source

Coherent precipitation of silicon nitride in silicon

Applied Physics Letters, 1988
Coherent growth of α-Si3N4 precipitates is observed in a silicon matrix after implantation of 150 keV N+ at a dose of 1×1018/cm2 into (110) silicon. The near-channeling conditions lead to a band of discrete precipitates, 0.5 μm below the continuous, polycrystalline buried nitride layer.
V. S. Kaushik, A. K. Datye, D. L. Kendall, B. Martinez-Tovar, D. R. Myers   +4 more
openaire   +1 more source

Coherent Precipitation — Phase Field Method

2005
Phase transformation is still the most efficient and effective way to produce various microstructures at mesoscales, and to control their evolution over time. In crystalline solids, phase transformations are usually accompanied by coherency strain generated by lattice misfit between coexisting phases.
C. Shen, Y. Wang
openaire   +1 more source

Coherent Precipitate Strengthening Mechanisms in MgO

1975
MgO containing magnesia ferrite particles is a model system for the study of the interaction between dislocations and second phase particles in ceramic materials. Therefore, several investigations have been performed on two-phase MgO under this aspect [1–7]. Magnesia ferrite crystalizes as inverse spinel with disorder [18].
B. Reppich, H. Knoch
openaire   +1 more source

High temperature cyclic deformation of precipitation hardened alloy—II. Fully coherent precipitates

Acta Metallurgica, 1979
Abstract An experimental investigation into the cyclic stress-strain behavior of an Al-4% Cu alloy aged to contain θ′', as a function of temperature is reported. Tests are carried from room temperature up to the aging temperature of the alloy. At all temperatures this microstructure cyclically hardens to a peak and then continually softens.
Shrikant P. Bhat, Campbell Laird
openaire   +1 more source

Critical sizes for the stabilization of coherent precipitates

Journal of Applied Physics, 2014
On growth of a precipitate beyond a critical size (r*), interfacial misfit dislocation loops are energetically stabilized. In the case of precipitation in (small) finite crystals, the energy of both the coherent precipitate and the dislocation loop are altered with respect to bulk crystals.
Arun Kumar, Monika Gautam, Anandh Subramaniam   +2 more
openaire   +1 more source

On the coherency-loss problem of growing precipitates

Philosophical Magazine, 1971
Abstract A computer simulation technique is used to study the coherency strains around a growing precipitate at an atomic level. It is found that the presence of vacancies at the interface may reduce the long-range stresses in the matrix due to local microslip in the region of the vacancy.
K. E. Easterling, T. Johannesson
openaire   +1 more source

Coarsening of ordered intermetallic precipitates with coherency stress

Acta Materialia, 2002
The morphological evolution and coarsening kinetics of ordered intermetallic precipitates with coherency stress were studied using a diffuse-interface phase-field model in two dimensions (2D). The emphasis is on the effects of precipitate volume fraction.
V. Vaithyanathan, L.Q. Chen
openaire   +1 more source