Effect of solidification grain refinement on the development of wrought Mg alloys

Easton, Mark, Davies, Chris, Barnett, Matthew and Pravdic, Franka 2007, Effect of solidification grain refinement on the development of wrought Mg alloys, Materials science forum, vol. 539, no. 543, pp. 1729-1734.

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Title Effect of solidification grain refinement on the development of wrought Mg alloys
Author(s) Easton, Mark
Davies, Chris
Barnett, Matthew
Pravdic, Franka
Journal name Materials science forum
Volume number 539
Issue number 543
Start page 1729
End page 1734
Publisher Trans Tech Publications
Place of publication Aedermannsdorf, Switzerland
Publication date 2007
ISSN 0255-5476
Keyword(s) wrought magnesium alloys
grain refinement
direct chill casting
Summary A recent trial investigated the effect of solidification grain refinement of billet on the grain refinement and properties of alloy ZM20. It was found that even at levels of 0.4Mn, significant grain refinement could be obtained when 0.7Zr was added. At 0.2Mn grain sizes as low as 60μm were
obtained. Billets of Mg-2Zn-0.2Mn with four different grain sizes, due to different Zr and cooling rates were then cast via vertical direct chill casting and extruded conventionally. Benefits of grain refinement of the billet on extrusion were found to be a slight increase in the size of the operating
window, and a reduction of the grain size in the extrudate. However, the effect of the reduction in extrudate grain size due to refinement of the billet was small compared with the amount of grain refinement obtained due to recrystallisation on extrusion.
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007811

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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