Solid-Solid Phase Transformations in Aluminium Alloys Described by a Multiphase-Field Model

2006 ◽  
pp. 579-584
Author(s):  
Igor Kovačević ◽  
Božidar Šarler
Keyword(s):  
Phase Transformations ◽  
Aluminium Alloys ◽  
Field Model ◽  
Solid Phase

Solid-Solid Phase Transformations in Aluminium Alloys Described by a Multiphase-Field Model

2006 ◽  
Vol 508 ◽  
pp. 579-584 ◽  
Author(s):  
Igor Kovačević ◽  
Božidar Šarler
Keyword(s):  
Phase Transformations ◽  
Aluminium Alloys ◽  
Field Model ◽  
Driving Forces ◽  
Solid Phase ◽  
Solute Diffusion ◽  
Aluminium Matrix ◽  
Field Equations ◽  
Integrated Concept ◽  
Using Data

A model for solving isothermal solid-solid phase transformations in multicomponent aluminium alloys is presented. A multiphase-field model for the dissolutions of various phases in an aluminium matrix during homogenization is presented. Driving forces for phase transformations are calculated using data obtained from the commercial software JMatPro and an aluminium database. An integrated concept of the multiphase-field model with solute diffusion is used. A onedimensional model for the simultaneous dissolution of the Mg2Si and Si phases in the aluminium matrix of ternary Al-Mg-Si alloys is introduced. An explicit central finite difference numerical scheme is used for the solution of the time transient phase-field equations and the solute diffusion equations.

Multiphase Phase-Field Approach for Virtual Melting: A Brief Review

2021 ◽  
Vol 18 (2) ◽  
pp. 102-107
Author(s):  
Arunabha Mohan Roy
Keyword(s):  
Phase Transformations ◽  
Phase Field ◽  
Field Model ◽  
Solid Phase ◽  
Scale Effects ◽  
Phase Field Model ◽  
Short Review ◽  
Nanoscale Material ◽  
Material Parameters ◽  
Field Approach

A short review on a thermodynamically consistent multiphase phase-field approach for virtual melting has been presented. The important outcomes of solid-solid phase transformations via intermediate melt have been discussed for HMX crystal. It is found out that two nanoscale material parameters and solid-melt barrier term in the phase-field model significantly affect the mechanism of PTs, induces nontrivial scale effects, and changes PTs behaviors at the nanoscale during virtual melting.

Heat capacities and enthalpies of fusion and transformation for solvates of some salts with dimethyl sulfoxide and dimethylformamide

1988 ◽  
Vol 53 (12) ◽  
pp. 3072-3079
Author(s):  
Mojmír Skokánek ◽  
Ivo Sláma
Keyword(s):  
Heat Capacity ◽  
Phase Transformation ◽  
Phase Transformations ◽  
Dimethyl Sulfoxide ◽  
Liquidus Temperature ◽  
Molar Heat Capacity ◽  
Solid Phase ◽  
Zinc Nitrate ◽  
Heat Capacities ◽  
Liquid Phases

Molar heat capacities and molar enthalpies of fusion of the solvates Zn(NO3)2 . 2·24 DMSO, Zn(NO3)2 . 8·11 DMSO, Zn(NO3)2 . 6 DMSO, NaNO3 . 2·85 DMSO, and AgNO3 . DMF, where DMSO is dimethyl sulfoxide and DMF is dimethylformamide, have been determined over the temperature range 240 to 400 K. Endothermic peaks found for the zinc nitrate solvates below the liquidus temperature have been ascribed to solid phase transformations. The molar enthalpies of the solid phase transformations are close to 5 kJ mol-1 for all zinc nitrate solvates investigated. The dependence of the molar heat capacity on the temperature outside the phase transformation region can be described by a linear equation for both the solid and liquid phases.

Reactivity in solid phase. Transformations of 2,4-di-tert-butylphenol and its derivatives under elastic deformation conditions

1996 ◽  
Vol 45 (6) ◽  
pp. 1428-1432
Author(s):  
V. B. Vol'eva ◽  
I. S. Belostotskaya ◽  
A. Yu. Karmilov ◽  
N. L. Komissaroya ◽  
V. V. Ershov
Keyword(s):  
Phase Transformations ◽  
Elastic Deformation ◽  
Solid Phase

The growth kinetics of individual ledges during solid-solid phase transformations

1981 ◽  
Vol 378 (1774) ◽  
pp. 351-368 ◽  
Keyword(s):  
Phase Transformations ◽  
Volume Diffusion ◽  
Solid Phase ◽  
Parent Phase ◽  
Steady Motion ◽  
Diffusion Field ◽  
Lateral Growth ◽  
Small Perturbations ◽  
Step Motion ◽  
Kinetics Of

The problem of step motion during lateral growth in solid-solid phase transformations is re-examined. Results are obtained for the steady motion of an individual ledge when volume diffusion in the parent phase is the predominant contribution to the growth rate. A comparison is made between our results and the earlier work of Jones & Trivedi (1971). There are significant differences between the two sets of results particularly in the limit of small perturbations to the Laplacian diffusion field. To confirm the accuracy of the results presented here the calculations have been made by two different methods.

Sign in / Sign up

Export Citation Format

Share Document