The effect of alloy content on the grain refinement of aluminium alloys

Easton M. A. and Stjohn D. H. (2013). The effect of alloy content on the grain refinement of aluminium alloys. In John F. Grandfield and Dmitry G. Eskin (Ed.), Cast Shop for Aluminum Production (pp. 393-399) Hoboken, NJ, USA: John Wiley & Sons. doi:10.1002/9781118647783.ch48

Author Easton M. A.
Stjohn D. H.
Title of chapter The effect of alloy content on the grain refinement of aluminium alloys
Title of book Cast Shop for Aluminum Production
Place of Publication Hoboken, NJ, USA
Publisher John Wiley & Sons
Publication Year 2013
Sub-type Research book chapter (original research)
DOI 10.1002/9781118647783.ch48
Open Access Status
Series Essential Readings in Light Metals
ISBN 9781118635711
Editor John F. Grandfield
Dmitry G. Eskin
Volume number 3
Start page 393
End page 399
Total pages 7
Collection year 2014
Subjects 2500 Materials Science
Formatted Abstract/Summary
A recent model that predicts the effect of solute content on grain size was shown to predict the effect of titanium additions on the grain size of pure aluminium and an AlSi7Mg0.3 alloy. The model assumes that nucleation on substrates is facilitated by constitutional undercooling in front of a growing grain. To determine how generally applicable the model is to a broad range of aluminium alloys, titanium additions were made to five wrought alloys containing the same level of TiB2. It was found that the grain size obtained is a function of the reciprocal of mc0(k-l), the growth restriction factor, and that there is a lower limit to the grain size that can be achieved for the casting conditions used in the experiments. It was also found that at least stoichiometric levels of titanium are required for TiB2 particles to be effective nucleants.
Keyword Aluminium alloys
Grain refinement
Growth restriction factor
Wrought alloys
Q-Index Code BX
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Book Chapter
Collections: School of Mechanical & Mining Engineering Publications
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Created: Thu, 28 Nov 2013, 21:19:23 EST by System User on behalf of School of Mechanical and Mining Engineering