Grain morphology of as-cast wrought aluminium alloys

Easton, Mark, Davidson, Cameron and St John, David (2010). Grain morphology of as-cast wrought aluminium alloys. In: Osamu Umezawa, Shinji Kumai, Yoshimasa Takayama, Takayuki Tsuchida and Tatsuo Sato, Proceedings of the 12th International Conference on Aluminium Alloys. 12th International Conference on Aluminium Alloys (ICAA12), Yokohama, Japan, (173-178). 5-9 September 2010.

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Author Easton, Mark
Davidson, Cameron
St John, David
Title of paper Grain morphology of as-cast wrought aluminium alloys
Conference name 12th International Conference on Aluminium Alloys (ICAA12)
Conference location Yokohama, Japan
Conference dates 5-9 September 2010
Proceedings title Proceedings of the 12th International Conference on Aluminium Alloys
Place of Publication Tokyo, Japan
Publisher The Japan Institute of Light Metals
Publication Year 2010
Sub-type Fully published paper
Editor Osamu Umezawa
Shinji Kumai
Yoshimasa Takayama
Takayuki Tsuchida
Tatsuo Sato
Start page 173
End page 178
Total pages 6
Language eng
Abstract/Summary Two of the most important microstructural features of alloys are the grain size and the dendrite arm spacing (DAS). Both grain refinement and the DAS depend upon alloy composition through constitutional undercooling, but in different ways. Grain size tends to be related to the initial rate of development of constitutional undercooling, whilst the DAS is more related to the amount of solute build-up towards the end of the solidification process. This means that element additions that have a large effect on the grain size, e.g. Ti, have much less effect on the DAS. With examples from a range of wrought Al alloys, this paper investigates how the interaction between alloy content, grain refiner additions and cooling rate affect the grain size, DAS and the grain morphology obtained in an alloy.
Keyword Grain size
Dendrite arm spacing
Cooling rate
Constitutional undercooling
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Wed, 23 Mar 2011, 14:07:17 EST by Sally Beard on behalf of School of Mechanical and Mining Engineering