Real-time synchrotron x-ray observations of equiaxed solidification of aluminium alloys and implications for modelling

Prasad, A., Liotti, E., McDonald, S. D., Nogita, K., Yasuda, H., Grant, P. S. and StJohn, D. H. (2015). Real-time synchrotron x-ray observations of equiaxed solidification of aluminium alloys and implications for modelling. In: MCWASP XIV: International Conference On Modelling of Casting, Welding and Advanced Solidification Processes. 14th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes, Awaji island, Hyogo, Japan, (1-8). 21-26 June 2015. doi:10.1088/1757-899X/84/1/012014


Author Prasad, A.
Liotti, E.
McDonald, S. D.
Nogita, K.
Yasuda, H.
Grant, P. S.
StJohn, D. H.
Title of paper Real-time synchrotron x-ray observations of equiaxed solidification of aluminium alloys and implications for modelling
Conference name 14th International Conference on Modeling of Casting, Welding and Advanced Solidification Processes
Conference location Awaji island, Hyogo, Japan
Conference dates 21-26 June 2015
Convener H. Yasuda
Proceedings title MCWASP XIV: International Conference On Modelling of Casting, Welding and Advanced Solidification Processes   Check publisher's open access policy
Journal name IOP Conference Series: Materials Science and Engineering   Check publisher's open access policy
Place of Publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Publication Year 2015
Year available 2015
Sub-type Fully published paper
DOI 10.1088/1757-899X/84/1/012014
Open Access Status DOI
ISSN 1757-8981
1757-899X
Volume 84
Issue 1
Start page 1
End page 8
Total pages 8
Collection year 2016
Language eng
Abstract/Summary Recently, in-situ observations were carried out by synchrotron X-ray radiography to observe the nucleation and growth in Al alloys during solidification. The nucleation and grain formation of a range of Al-Si and Al-Cu binary alloys were studied. When grain refiner was added to the alloys, the location of the nucleation events was readily observed. Once nucleation began it continued to occur in a wave of events with the movement of the temperature gradient across the field of view due to cooling. Other features observed were the settling of the primary phase grains in the Al-Si alloys and floating in the Al-Cu alloys, the effects of convection with marked fluctuation of the growth rate of the solid-liquid interface in the Al-Si alloys, and an absence of fragmentation. The microstructures are typical of those produced in the equiaxed zone of actual castings. These observations are compared with predictions arising from the Interdependence model. The results from this comparison have implications for further refinement of the model and simulation and modelling approaches in general. These implications will be discussed.
Keyword Field
Flow
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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