A physically based phenomenological model for deformation twinning in magnesium alloy

Barnett, Matthew 2012, A physically based phenomenological model for deformation twinning in magnesium alloy, in TMS 2012 : Supplemental Proceedings for the Magnesium Technology Annual Meeting and Exhibition, [The Conference], Orlando, Fla., pp. 1-1.

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Title A physically based phenomenological model for deformation twinning in magnesium alloy
Author(s) Barnett, Matthew
Conference name Magnesium Technology Annual Meeting and Exhibition (2012 : Orlando, Florida)
Conference location Orlando, Florida
Conference dates 11-15 Mar. 2012
Title of proceedings TMS 2012 : Supplemental Proceedings for the Magnesium Technology Annual Meeting and Exhibition
Editor(s) [Unknown]
Publication date 2012
Conference series Magnesium Technology Meeting and Exhibition : Part of Minerals, Metals and Materials Society Annual Meeting
Start page 1
End page 1
Total pages 1
Publisher [The Conference]
Place of publication Orlando, Fla.
Summary A partial differential equation is developed that captures the evolution of key characteristics of tensile twinning in magnesium base alloys. The objective is to provide a framework for ascertaining the effects of hardening – due to grain refinement, precipitation and dislocation substructure – on twin volume fraction, thickness and length. The model is developed with the help of observations made on alloy AZ31. It is shown that it is necessary to consider the nucleation of twins at locations where neighbouring twins impinge on the grain boundary. The model provides a reasonable approximation for the role of grain size on twinning. It predicts a period of low apparent work hardening following yielding and shows that this should be more extensive for finer grain sizes, in agreement with experiment. Finally, some predictions are made on the effect of changing the resistance to twinning.
Language eng
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category E3.1 Extract of paper
Persistent URL http://hdl.handle.net/10536/DRO/DU:30061667

Document type: Conference Paper
Collection: Institute for Frontier Materials
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