Compositional effects on the restoration behaviour in Mg-Zn-Re alloys

Ross, N.G., Barnett, M.R. and Beer, A.G. 2013, Compositional effects on the restoration behaviour in Mg-Zn-Re alloys, Materials science forum, vol. 765, pp. 18-22.

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Title Compositional effects on the restoration behaviour in Mg-Zn-Re alloys
Author(s) Ross, N.G.
Barnett, M.R.
Beer, A.G.
Journal name Materials science forum
Volume number 765
Start page 18
End page 22
Total pages 5
Publisher Trans Tech Publications
Place of publication Stafa-Zurich, Switzerland
Publication date 2013
ISSN 0255-5476
Keyword(s) Wrought Mg-Zn-RE alloys
Restoration kinetics
Summary Additions of rare earth elements to magnesium alloys are qualitatively reported in the literature to retard recrystallisation. However, their effect in the presence of other (non-rare earth) alloy additions has not been systematically shown nor has the effect been quantified. The microstructural restoration following the hot deformation of Mg-xZn-yRE (x = 2.5 and 5 wt.%, y = 0 and 1 wt.%, and RE = Gd and Y) alloys has been studied using double hit compression testing and microscopy. It was found that, in the absence of rare earth additions, increases in zinc level had a negligible influence on the kinetics of restoration and the microstructure developed both during extrusion and throughout double hit testing. Adding rare earth elements to Mg-Zn alloys was found to retard restoration of the microstructure and maintain finer recrystallised grains. However, in the Mg-Zn-RE alloys, increasing the zinc concentration from 2.5 wt.% to 5 wt.% accelerated the restoration process, most likely due to a depletion of rare earth elements from solid solution and modification of the particles present in the matrix.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30057655

Document type: Journal Article
Collection: Institute for Frontier Materials
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