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Clouet, Emmanuel; Barbu, Alain; La, Ludovic; Martin, Georges |
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Publication |
Precipitation kinetics of Al3Zr and Al3Sc in aluminum alloys modeled with cluster dynamics |
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Journal Article |
Pages |
2005 |
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Abstract |
Acta Materialia |
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Corporate Author |
Acta Mater. |
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53 |
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Editor |
8 |
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Summary Language |
2313-2325 |
Series Editor |
Precipitation; Kinetics; Aluminum alloys; Cluster dynamics |
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Abbreviated Series Title |
Precipitation kinetics of Al3Zr and Al3Sc in aluminum supersaturated solid solutions is studied using cluster dynamics, a mesoscopic modeling technique which describes the various stages of homogeneous precipitation by a single set of rate equations. The only parameters needed are the interface free energy and the diffusion coefficient which are deduced from an atomic model previously developed to study the same alloys. A comparison with kinetic Monte-Carlo simulations based on the vacancy diffusion mechanism shows that cluster dynamics correctly predicts the precipitation kinetics provided a size dependent interface free energy is used. It also manages to reproduce reasonably well existing experimental data. |
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NU @ karnesky @ |
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211 |
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Martin, G. |
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A diffuse interface model for the interfacial transfer coefficient |
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Journal Article |
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2005 |
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Acta Materialia |
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53 |
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9 |
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2629-2632 |
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Diffusion; Interfaces; Alloys; Kinetics; Phase field models; Theory |
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Based on an extension to non-equilibrium problems, of Cahn's interface layer thermodynamics, we demonstrate that the matrix of transfer coefficients across a coherent interface between two phases, [alpha] and [beta], can be viewed as a correction to the Onsager's matrix of mobility coefficients along the continuous concentration profile. The latter coefficients are defined along the equilibrium concentration profile in the interfacial layer and in the [alpha]- and [beta]-phases. Combining the above definition with that of solute interfacial excess, we can define transfer coefficients relative to two components chosen arbitrarily, the values of which are intrinsic properties of the interfacial layer, independent of its precise location and thickness. |
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NU @ p-kolli @ |
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9702 |
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Walls, J. M.; Martin, A. D.; Southworth, H. N. |
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Combined FIM AES and LEED study of the structure and composition of ion- bombarded W surfaces |
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Journal Article |
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1975 |
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Surface Science |
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Surf. Sci. |
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50 |
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low energy ion bombardment; Field Ion Microscopy |
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6984 |
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Hadjadj, L.; Menand, A.; Martin, C. |
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Atom probe study of a Ti-10V-2Fe-3Al alloy: preliminary results |
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Journal Article |
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1987 |
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Journal de Physique |
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J. de Phys. |
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48-C6 |
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atom probe field ion microscopy |
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3825 |
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Menand, A.; Chambreland, S.; Martin, C. |
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Atom probe study of titanium base alloys: preliminary results |
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Journal Article |
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1986 |
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Journal de Physique |
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J. de Phys. |
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47-C2 |
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atom probe field ion microscopy |
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3651 |
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Pareige, C.; Soisson, F.; Martin, G.; Blavette, D. |
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Ordering and phase separation in Ni-Cr-Al: Monte Carlo simulations vs three-dimensional atom probe |
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Journal Article |
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1999 |
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Acta Materialia |
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Acta Mater. |
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47 |
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1889-1899 |
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3D Atom Probe, Phase transformation |
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2401 |
| Permanent link to this record |
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Menand, A.; Martin, C.; Sarrau, J. M. |
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Field evaporation charge state of boron ions: a temperature effect study |
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Journal Article |
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1984 |
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Journal de Physique |
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J. de Phys. |
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45-C9 |
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8612 |
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Cetronio, A.; Jones, J. P.; Martin, A. D. |
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Computer simulation of ion images as an aid to indexing small crystallites |
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Journal Article |
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1974 |
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Surface Science |
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Surf. Sci. |
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44 |
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computer simulation; Field Ion Microscopy |
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6715 |
| Permanent link to this record |
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Soisson, F.; Barbu, A.; Martin, G. |
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Monte Carlo simulations of copper precipitation in dilute iron-copper alloys during thermal ageing and under electron irradiation |
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Journal Article |
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1996 |
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Acta Materialia |
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Acta Mater. |
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44 |
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9 |
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3789-3800 |
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We propose a Monte Carlo simulation of the coherent precipitation of copper in [alpha]-iron using a vacancy diffusion mechanism. The only adjustable parameters are the vacancy concentration and the local vacancy jump frequencies. The latter are deduced from pair interactions restricted to nearest neighbour atoms. Precipitation kinetics are compared to recent experimental studies of precipitation in dilute Fe---Cu solid solutions during thermal ageing or electron irradiation (electrical resistivity measurements). The degree of advancement of the unmixing process as a function of time has the form of a stretched exponential, in good agreement with experiment. The simulation also provides interesting information on precipitate morphology and growth mechanisms which are useful for experimental data analysis. |
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NU @ karnesky @ |
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1917 |
| Permanent link to this record |
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Jones, J. P.; Martin, A. D. |
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High field microscopy of nickel on tungsten |
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Journal Article |
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1974 |
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Surface Science |
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Surf. Sci. |
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41 |
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thin film nucleation; Field Ion Microscopy |
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no |
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6758 |
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