MICRO-MODELING ON NON-EQUILIBRIUM SOLIDIFICATION PROCESS OF GRAY IRON

2000 ◽  
Vol 36 (09) ◽  
pp. 52
Author(s):  
Yunpeng Zhang
Keyword(s):  
Solidification Process ◽  
Gray Iron ◽  
Equilibrium Solidification ◽  
Micro Modeling ◽  
Non Equilibrium

scholarly journals ThermoCalc Application for the Assessment of Binary Alloys Non-Equilibrium Solidification

2017 ◽  
Vol 17 (1) ◽  
pp. 163-168
Author(s):  
A. Zyska ◽  
Z. Konopka ◽  
M. Łągiewka ◽  
P. Kordas
Keyword(s):  
Solid Phase ◽  
Solidus Temperature ◽  
Binary Alloys ◽  
Solidification Process ◽  
Solute Concentration ◽  
Diffusion Parameter ◽  
Temperature Phase ◽  
Back Diffusion ◽  
Equilibrium Solidification ◽  
Non Equilibrium

Abstract The paper presents the possibility of application of the developed computer script which allows the assessment of non-equilibrium solidification of binary alloys in the ThermoCalc program. The script makes use of databases and calculation procedures of the POLY-3 module. A solidification model including diffusion in the solid state, developed by Wołczyński, is used to describe the non-equilibrium solidification. The model takes into account the influence of the degree of solute segregation on the solidification process by applying the so-called back-diffusion parameter. The core of the script is the iteration procedure with implemented model equation. The possibility of application of the presented calculation method is illustrated on the example of the Cr-30% Ni alloy. Computer simulations carried out with use of the developed script allow to determine the influence of the back-diffusion parameter on the course of solidification curves, solidus temperature, phase composition of the alloy and the fraction of each phase after the solidification completion, the profile of solute concentration in liquid during solidification process, the average solute concentration in solid phase at the eutectic temperature and many other quantities which are usually calculated in the ThermoCalc program.

Numerical Simulation of Rapid Solidification Process for Micrometer Level Solder Ball Used in BGA Packaging

2014 ◽  
Vol 981 ◽  
pp. 137-140
Author(s):  
Shu Li ◽  
Jian Wei Huang ◽  
Fei Wang ◽  
Wei Liu
Keyword(s):  
Numerical Simulation ◽  
Rapid Solidification ◽  
Solder Ball ◽  
Solidification Process ◽  
Solidification Microstructure ◽  
Rapid Solidification Process ◽  
Droplet Nucleation ◽  
Equilibrium Solidification ◽  
Prior Models ◽  
Non Equilibrium

We numerically simulated the containerless rapid solidification for micrometer level solder ball used in BGA packaging, based on prior models for heterogeneous droplet nucleation and non-equilibrium solidification, to predict the solidification microstructure of solder ball. Results of simulations for Sn-5mass%Pb solder ball produced under different conditions are discussed.

scholarly journals The development of non-equilibrium solidification theories

2015 ◽  
Vol 45 (4) ◽  
pp. 358-376 ◽  
Author(s):  
WangWang KUANG ◽  
HaiFeng WANG ◽  
Feng LIU ◽  
Kang WANG
Keyword(s):  
Equilibrium Solidification ◽  
Non Equilibrium

scholarly journals Back-Diffusion In Crystal Growth. Eutectics

2015 ◽  
Vol 60 (3) ◽  
pp. 2403-2407 ◽  
Author(s):  
W. Wołczyński
Keyword(s):  
Differential Equation ◽  
Crystal Growth ◽  
Current Model ◽  
Solute Segregation ◽  
Solidification Path ◽  
Back Diffusion ◽  
Eutectic Alloys ◽  
Equilibrium Solidification ◽  
Solid Liquid ◽  
Non Equilibrium

Abstract Solute segregation/redistribution model for some eutectic alloys is presented. The differential equation for the solute micro-segregation during solidification accompanied by the back-diffusion is formulated. The solution to this equation results in the definitions of: solidification path, solid/liquid (s/l) interface path and redistribution path. An equation for the estimation of the amount of equilibrium and non-equilibrium precipitates is also delivered. It is proved that the current model is universal one. Thus, the model reduces perfectly, mathematically to both description of diffusion-less solidification and model of equilibrium solidification.

Investigation of the non-equilibrium solidification microstructure of a Mg–4Al–2RE (AE42) alloy

2016 ◽  
Vol 51 (13) ◽  
pp. 6287-6294 ◽  
Author(s):  
Weihua Sun ◽  
Xiaoying Shi ◽  
Emre Cinkilic ◽  
Alan A. Luo
Keyword(s):  
Solidification Microstructure ◽  
Equilibrium Solidification ◽  
Non Equilibrium
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