On the impact of second phase particles on twinning in magnesium alloys

Barnett, M. R., Stanford, N., Geng, J. and Robson, J. 2011, On the impact of second phase particles on twinning in magnesium alloys, in TMS 2011 : Magnesium Technology 2011 : Proceedings of the Magnesium Technology Symposium, John Wiley & Sons, Hoboken, N. J., pp. 289-293.

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Title On the impact of second phase particles on twinning in magnesium alloys
Author(s) Barnett, M. R.
Stanford, N.
Geng, J.
Robson, J.
Conference name Minerals, Metals and Materials Society (TMS) Annual Meeting and Exhibition (140th : 2011 : San Diego, Calif.)
Conference location San Diego, Calif.
Conference dates 27 Feb.-3 Mar. 2011
Title of proceedings TMS 2011 : Magnesium Technology 2011 : Proceedings of the Magnesium Technology Symposium
Editor(s) Sillekens, Wim H.
Agnew, Sean R.
Neelameggham, Neale R.
Mathaudhu, Suveen N.
Publication date 2011
Conference series Minerals, Metals and Materials Society (TMS) Annual Meeting and Exhibition
Start page 289
End page 293
Total pages 5
Publisher John Wiley & Sons
Place of publication Hoboken, N. J.
Keyword(s) magnesium
twinning
precipitation
TEM
Summary Deformation twinning is an important deformation mode in magnesium alloys. Despite this, little is known on the extent to which the stress for twinning can be altered by a dispersion of second phase particles. The current paper presents a series of findings on the role of differently shaped particles on both the stress required for twinning and the characteristics of the twins that form. It is shown that plate shaped particles are, as one might expect, an effective strengthener to {10-12} twinning. When precipitate plates form on the basal planes, the relative hardening of basal slip is minor in comparison to that seen for twinning. This provides opportunity for the alloy designer to control the apparent critical resolved shear stresses (CRSS) for the different deformation modes. Possible sources for the hardening of twins are discussed.
ISBN 9781118029367
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861199 Basic Metal Products (incl. Smelting, Rolling, Drawing and Extruding) not elsewhere classified
HERDC Research category E1 Full written paper - refereed
Copyright notice ©2011, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30042257

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