Microstructural development during hot working of Mg-3AI-1Zn

Beer, Aiden and Barnett, Matthew 2007, Microstructural development during hot working of Mg-3AI-1Zn, Metallurgical and materials transactions A-physical metallurgy and materials science, vol. 38A, no. 8, pp. 1856-1867.

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Title Microstructural development during hot working of Mg-3AI-1Zn
Author(s) Beer, Aiden
Barnett, Matthew
Journal name Metallurgical and materials transactions A-physical metallurgy and materials science
Volume number 38A
Issue number 8
Start page 1856
End page 1867
Publisher Springer Boston
Place of publication Boston, Mass.
Publication date 2007-07-13
ISSN 1073-5623
1543-1940
Keyword(s) deformation
grain size and shape
hot pressing
metallographic microstructure
recrystallization (metallurgy)
microstructural development
particle-stimulated nucleation
magnesium alloys
Summary he microstructural evolution is examined during the hot compression of magnesium alloy AZ31 for both wrought and as-cast initial microstructures. The influences of strain, temperature, and strain rate on the dynamically recrystallized microstructures are assessed. Both the percentage dynamic recrysallization (DRX) and the dynamically recrystallized grain size were found to be sensitive to the initial microstructure and the applied deformation conditions. Lower Z conditions (lower strain rates and higher temperatures) yield larger dynamically recrystallized grain sizes and increased percentages of DRX, as expected. The rate with which the percentage DRX increases for the as-cast material is considerably lower than for the wrought material. Also, in the as-cast samples, the percentage DRX does not continue to increase toward complete DRX with decreasing Z. These observations may be attributed to the deformation becoming localized in the DRX fraction of the material. Also, the dynamically recrystallized grain size is generally larger in as-cast material than in wrought material, which may be attributed to DRX related to twins and the inhomogeneity of deformation. Orientation maps of the as-cast material (from electron backscattering diffraction (EBSD) data) reveal evidence of discontinuous DRX (DDRX) and DRX related to twins as predominant mechanisms, with some manifestation of continuous DRX (CDRX) and particle-stimulated nucleation (PSN).
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 870302 Metals (e.g. Composites, Coatings, Bonding)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2007, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007758

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