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Twinning and the ductility of magnesium alloys Part II. “Contraction” twins

Barnett, Matthew 2007, Twinning and the ductility of magnesium alloys Part II. “Contraction” twins, Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing, vol. 464, no. 1-2, pp. 8-16.


Title Twinning and the ductility of magnesium alloys Part II. “Contraction” twins
Author(s) Barnett, Matthew
Journal name Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
Volume number 464
Issue number 1-2
Start page 8
End page 16
Publisher Elsevier B.V.
Place of publication Amsterdam, The Netherlands
Publication date 2007-08-25
ISSN 0921-5093
Keyword(s) tensile test
ductility
work softening
twinning
Summary Magnesium and its alloys do not in general undergo the same extended range of plasticity as their competitor structural metals. The present work presents part II of a study that examines some of the roles deformation twinning might play in the phenomenon. A series of tensile and compression tests results are reported for common wrought alloys: AZ31, ZK60 and ZM20. These data are combined with EBSD analysis and simple flow stress models to argue the following: (i) that “contraction” double twinning (which enables contraction along the c axis) can decrease the uniform elongation, and (ii) that compression double twinning can also account for shear failure at low strains. The last of these is described as a combined consequence of strain softening of the continuum and the local generation of twin sized voids.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30007543

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