Results 221 to 230 of about 5,784 (244)

Simulation of precipitates evolution in multiphase multicomponent systems with consideration of nucleation

Philosophical Magazine, 2016
AbstractA numerical method of simulation of precipitates evolution in multiphase multicomponent systems is suggested. This method is based on the mean field approximation for the description of evolution of the pre-existing particles and on the classical theory of nucleation for calculation of the rate of formation of new nucleation centres.
V. V. Popov, I. I. Gorbachev, A. Yu. Pasynkov   +2 more
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How to Estimate Material Parameters for Multiphase, Multicomponent Precipitation Modeling

Crystal Growth & Design, 2019
The simultaneous precipitation of multiple solid phases inside a T-mixer was investigated both numerically and experimentally based on the model system BaSO4 and BaCO3. With a population balance equation model including mixing, hydrochemistry, and solid formation kinetics, the global solid phase composition was calculated and compared to experimental ...
Andreas Güldenpfennig, Lukas Pflug, Wolfgang Peukert   +2 more
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Modeling precipitate growth in multicomponent alloy systems by a variational principle

Acta Materialia, 2014
Abstract A physically based state variable model is proposed to simulate precipitate growth encountered in many industry-relevant precipitation processes. The model is derived from the same variational principle used in deriving the phase field method, and is able to efficiently model diffusion-controlled precipitate growth in multicomponent alloy ...
Q. Du, J. Friis
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APFIM study of multicomponent M2C carbide precipitation in AF1410 steel

Surface Science Letters, 1990
Abstract The development of fine-scale multicomponent M 2 C carbides in AF1410 steel was observed as a function of time at the standard tempering temperature of 510°C. Strong departures from equilibrium compositions are observed at early stages of precipitation, and carbide composition appears to be particle size dependent in a given microstructure ...
G.B. Olson, T.J. Kinkus, J.S. Montgomery
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Modelling precipitation of niobium carbide in austenite: multicomponent diffusion, capillarity, and coarsening

Materials Science and Technology, 2001
AbstractThe growth of niobium carbide in austenite involves the diffusion of both niobium and carbon. These elements diffuse at very different rates. A model is presented for the overall transformation kinetics of niobium carbide precipitation in austenite that takes into account the multicomponent nature of the diffusion process while at the same time
N. Fujita, H.K.D.H. Bhadeshia
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From embryos to precipitates: A study of nucleation and growth in a multicomponent ferritic steel

Physical Review B, 2011
The nucleation and growth of nanoscale precipitates in a new class of high-strength, multicomponent, ferritic steels has been studied with complementary state-of-the-art microstructural characterization techniques of atom probe tomography for individual embryos and precipitates and small-angle neutron scattering for their statistical averages.
Z. W. Zhang, C. T. Liu, X.-L. Wang, K. C. Littrell, M. K. Miller, K. An, B. A. Chin   +6 more
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Multicomponent High-Strength Low-Alloy Steel Precipitation-Strengthened by Sub-nanometric Cu Precipitates and M2C Carbides

Metallurgical and Materials Transactions A, 2016
HSLA-115 is a novel high-strength low-alloy structural steel derived from martensitic Cu-bearing HSLA-100. HSLA-100 is typically used in conditions with overaged Cu precipitates, to obtain acceptable impact toughness and ductility. Present work on HSLA-115 demonstrates that incorporating sub-nanometric-sized M2C carbides along with Cu precipitates ...
Divya Jain, Dieter Isheim, Allen H. Hunter, David N. Seidman   +3 more
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Effect of aluminium on the equilibrium precipitation of a multicomponent f.c.c. carbonitride in microalloyed steels

Materials Science and Engineering: A, 1992
Abstract A method is presented for calculating the equilibrium between austenite, aluminium nitride and a NaCl-type carbonitride of the form (Nb, V, Ti …) (C, N) from the solubility products of the carbides and nitrides. The method can be extended to allow for the coexistence of any number of individual carbides and nitrides with the NaCl-type ...
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Finite Element Analysis of Multicomponent Contaminant Transport Including Precipitation-Dissolution Reactions

1984
The determination of the fate of contaminants that enter groundwater systems pose difficult mathematical problems for the modeler. This is particularly true when complex multi component interactions occur among mobile and immobile species. The types of chemical reactions that can occur include; acid-base, adsorption-desorption, complex formation, ion ...
David J. Kirkner, Howard W. Reeves, Aaron A. Jennings   +2 more
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Numerical modeling of solid precipitation from multicomponent hydrothermal solutions

Geothermal energy is gaining increasing attention as a promising alternative to fossil fuels. The advantage of geothermal power plants over thermal power plants that operate by burning fossil fuels is considered to be the low level of greenhouse gas emissions, primarily carbon dioxide.
Anna Isaeva, Lyudmila Khakimova, Yury Podladchikov   +2 more
openaire   +1 more source