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Contribution of twinning to low strain deformation in a Mg alloy

Barnett,MR, Ghaderi,A and Robson,JD 2014, Contribution of twinning to low strain deformation in a Mg alloy, Metallurgical and materials transactions A: physical metallurgy and materials science, vol. 45, no. 8, pp. 3213-3221, doi: 10.1007/s11661-013-2029-8.

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Title Contribution of twinning to low strain deformation in a Mg alloy
Author(s) Barnett,MRORCID iD for Barnett,MR orcid.org/0000-0001-8287-9044
Ghaderi,AORCID iD for Ghaderi,A orcid.org/0000-0002-6774-9302
Robson,JD
Journal name Metallurgical and materials transactions A: physical metallurgy and materials science
Volume number 45
Issue number 8
Start page 3213
End page 3221
Publisher Springer
Place of publication New York, NY
Publication date 2014-07
ISSN 1073-5623
1543-1940
Keyword(s) Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
SITU NEUTRON-DIFFRACTION
MAGNESIUM ALLOY
AZ31
COMPRESSION
RELAXATION
BEHAVIOR
MODELS
Summary Deformation twinning plays an important role in the yielding of extruded magnesium alloys, especially when loaded in compression along the extrusion axis. The magnitude of this contribution is not accurately known. The present study employs electron backscatter diffraction to reveal the influence of grain orientation on twin-volume fraction for alloy AZ31 tested in compression to strains between 0.008 and 0.015. For these strains, it is seen that approximately 45 pct of the deformation can be attributed to "tensile" twinning. The variation of twin-volume fraction over different orientation classes correlates closely with the maximum Schmid factors for both tensile twinning and basal slip. These effects are readily explained quantitatively using a mean field crystal plasticity model without recourse to stochastic effects. Encouraged by this, we introduce an analytical approximation based on the uniformity of (axial) work. © 2013 The Minerals, Metals & Materials Society and ASM International.
Language eng
DOI 10.1007/s11661-013-2029-8
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861199 Basic Metal Products (incl. Smelting
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30069825

Document type: Journal Article
Collection: Institute for Frontier Materials
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