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, doi: 10.4028/

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Title Compositional effects on the restoration behaviour in Mg-Zn-Re alloys
Author(s) Ross, N.G.
Barnett, M.R.ORCID iD for 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
DOI 10.4028/
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
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