Estimating critical stresses required for twin growth in a magnesium alloy

Barnett, Matthew, Setty, Mohan and Siska, Filip 2013, Estimating critical stresses required for twin growth in a magnesium alloy, Metallurgical and materials transactions A, vol. 44, no. 7, pp. 2962-2969.

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Title Estimating critical stresses required for twin growth in a magnesium alloy
Author(s) Barnett, Matthew
Setty, Mohan
Siska, Filip
Journal name Metallurgical and materials transactions A
Volume number 44
Issue number 7
Start page 2962
End page 2969
Total pages 8
Publisher Springer New York LLC
Place of publication New York, N.Y.
Publication date 2013-07
ISSN 1073-5623
Summary The aim of this study is to determine a value for the critical resolved stress for the growth of deformation twins. Loading–unloading tests are performed on extruded magnesium alloy Mg-3Al-1Zn to determine the loads under which twins begin to shrink during unloading. After conversion of the applied stress to mean resolved values, the critical stresses are seen to increase from 6 to 14 MPa as the plastic applied strain is raised from 1 to 6 pct. It is suggested that the “relaxation” dislocations generated to accommodate the twinning strain contribute to building a hard dislocation forest. The effect is analyzed by analogy with accommodation dislocations formed at non-deforming particles.
Language eng
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, Springer
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Document type: Journal Article
Collection: Institute for Frontier Materials
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