A semianalytical Sachs model for the flow stress of a magnesium alloy

Barnett, Matthew, Keshavarz, Zohreh and Ma, Xiang 2006, A semianalytical Sachs model for the flow stress of a magnesium alloy, Metallurgical and materials transactions A, vol. 37, no. 7, pp. 2283-2293, doi: 10.1007/BF02586147.

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Title A semianalytical Sachs model for the flow stress of a magnesium alloy
Author(s) Barnett, MatthewORCID iD for Barnett, Matthew orcid.org/0000-0001-8287-9044
Keshavarz, ZohrehORCID iD for Keshavarz, Zohreh orcid.org/0000-0001-6912-5862
Ma, Xiang
Journal name Metallurgical and materials transactions A
Volume number 37
Issue number 7
Start page 2283
End page 2293
Publisher Springer Boston
Place of publication Boston, Mass.
Publication date 2006-07
ISSN 1073-5623
Summary A semianalytical Sachs-type equation for the flow stress of magnesium-base alloys is developed using the Schmid law, power law hardening, and a sigmoidal increase in the twinning volume fraction with strain. Average Schmid factors were estimated from electron backscattered diffraction (EBSD) data. With these, the equation provides a reasonable description of the flow curves obtained in compression and tension for samples of Mg-3Al-1Zn cut in different orientations from rolled plate. The model illustrates the general importance of basal slip and twinning in magnesium alloys. The significance of prismatic slip in room temperature tension testing is also highlighted. This is supported with EBSD slip line trace analysis and rationalized in terms of a possible sensitivity of the critical resolved shear stress for prismatic (cross) slip to the stress on the basal plane.
Language eng
DOI 10.1007/BF02586147
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30003819

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