Choice of Optimal Regimes in Cellular Decomposition, Diffusion‐Induced Grain Boundary Migration, and the Inverse Diffusion Problem

Lyashenko, Yu. O.

doi:10.1002/9783527631025.ch12

Cited by 1 publication

(2 citation statements)

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“…Lyashenko [15] emphasized a good correlation between the calculated and experimental parameters of DP reaction. However, the calculated concentration change across the α lamella for the Pb-15at.% Sn alloy corresponds to extremely thin lamella (50 nm) which is highly unrealistic because the same Author provides 120 nm as a typical value of the interlamellar distance.…”

Section: New Theories and Modelsmentioning

confidence: 99%

“…Lyashenko [15] proposed model of the DP using a set of equations for the (i) mass transfer in the moving interphase boundary, (ii) balance of the entropy fluxes at the phase transformation front, and (iii) maximum rate of the free energy release. The use of the principle of maximum rate of free energy release and balance of entropy fluxes allowed an independent determination of the main parameters, including the interlamellar distance, the maximum velocity of the phase transformation front, and the concentration jump at this boundary.…”

Section: New Theories and Modelsmentioning

confidence: 99%

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Recent Developments on Discontinuous Precipitation

Zięba¹

2017

Archives of Metallurgy and Materials

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The discontinuous precipitation (DP) belongs to a group of diffusive solid state phase transformations during which the formation of a new phase is heterogeneous and limited to a migrating reaction front (RF). The use of analytical electron microscopy provided reliable information that there is no differences in the diffusion rate at the stationary grain boundary and moving RF of DP reaction. On the other hand, the use of "in situ" transmission electron microscopy observations indicated the importance of stop-go motion or oscillatory movement of the RF.During 2004-2016 period more or less 280 papers were published in which the terms "discontinuous precipitation, "cellular precipitation", discontinuous coarsening" appeared either in the abstract or in key-words.In the present contribution, the research on the DP reaction will be reviewed taking into account new aspects of theories and modelling, new evidences and findings, effect of various factors including third element, external stresses, plastic deformation and GB orientation, occurrence in less known systems and alloys like: superalloys, nitrided Fe-based alloys and Cu-based alloys. Finally, some suggestions for the future research will be formulated.

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Section: New Theories and Modelsmentioning

confidence: 99%

Section: New Theories and Modelsmentioning

confidence: 99%