Modeling of columnar-to-equiaxed transition in solidified Al-Si alloys

Yao, Xiangdong and Wang, Hao and He, B. and Zhou, X. (2005) Modeling of columnar-to-equiaxed transition in solidified Al-Si alloys. In: 5th Pacific Rim International Conference on Advanced Materials and Processing (PRICM 5), 2-5 Nov 2004, Beijing, China.

Abstract

A Cellular-Automaton Finite-Volume-Method (CAFVM) algorithm has been developed, coupling with macroscopic model for heat transfer calculation and microscopic models for nucleation and growth. The solution equations have been solved to determine the time dependent constitutional undercooling and interface retardation during solidification. The constitutional undercooling is then coupled into the CAFVM algorithm to investigate both the effects of thermal and constitutional undercooling on columnar growth and crystal selection in the columnar zone, and formation of equiaxed crystals in the bulk liquid. The model cannot only simulate microstructures of alloys but also investigates nucleation mechanisms and growth kinetics of alloys solidified with various solute concentrations and solidification morphologies.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author version not held.
Depositing User: Ms Leslie Blay
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - No Department
Date Deposited: 13 May 2010 03:22
Last Modified: 16 Nov 2011 04:41
Uncontrolled Keywords: CAFVM; columnar equiaxed transition (CET); microstructure formation; modelling; solidification
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091207 Metals and Alloy Materials
12 Built Environment and Design > 1204 Engineering Design > 120404 Engineering Systems Design
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.4028/www.scientific.net/MSF.475-479.3141
URI: http://eprints.usq.edu.au/id/eprint/7987

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